These positions are too easy for engines around 2500-2600

[Terry McCracken]

You're overreacting. Albert is essentially correct but a little tactless.
He's right that these problems are meant to be solved by players below the level of master to sharpen their skills.

He is a relatively strong master and would find these positions as basically intermediate drills.

[pichy]

This position is a little bit more challenging for players less than 2300, I believe for this one you need an engine rated at least 2300 to find the best move.

White to play and win

[d]3rq1k1/rb4p1/2R1npNp/3n4/3P4/p5BP/B4PPK/1RQ5 w - - 0 1

Human don't see everything since after 2 minutes observing this position I could not see the final outcome, but engine are monsters in tactical positions even predateur rated 1945 immediately saw Rce6! the winning move


FEN: 3rq1k1/rb4p1/2R1npNp/3n4/3P4/p5BP/B4PPK/1RQ5 w - - 0 1

Predateur2.2.1_x32:
3/3 00:00 1.610 0 -1.78 Rc6xe6 Qe8xe6 Ba2xd5
3/4 00:00 1.911 0 -1.61 Rb1xb7 Ra7xb7 Ba2xd5
3/4 00:00 2.429 0 -1.56 Ba2xd5 Bb7xc6 Qc1xc6
5/8 00:00 16.751 1.116.000 -0.16 Ba2xd5 Rd8xd5 Rc6b6 Rd5d7 Qc1e3
6/9 00:00 76.368 1.231.000 -0.18 Ba2xd5 Rd8xd5 Rc6xe6 Qe8xe6 Ng6f4 Qe6f7
7/14 00:00 160.398 1.471.000 +1.42 Rc6xe6 Qe8xe6 Qc1c5 Qe6a6 Ng6e7+ Kg8h7 Ba2xd5 Bb7xd5
8/16 00:00 389.255 1.385.000 +1.50 Rc6xe6 Qe8xe6 Qc1c5 Qe6a6 Ng6e7+ Kg8h7 Ba2xd5 a3a2 Qc5c2+
9/24 00:00 860.934 1.451.000 +1.51 Rc6xe6 Qe8xe6 Qc1c5 Qe6a6 Ng6f4 Kg8h7 Ba2xd5 a3a2 Qc5c2+ Kh7h8
10/29 00:01 2.078.961 1.497.000 +1.48 Rc6xe6 Qe8xe6 Qc1c5 Qe6a6 Rb1b6 Qa6e2 Rb6xb7 Ra7xb7 Ba2xd5+ Rb7f7 Bd5xf7+ Kg8xf7
11/31 00:03 5.477.897 1.526.000 +1.52 Rc6xe6 Qe8xe6 Qc1c5 Qe6a6 Bg3c7 Rd8d7 Rb1xb7 Qa6xb7 Ba2xd5+ Rd7xd5 Qc5xd5+ Qb7xd5 Ng6e7+ Kg8f7
12/33 00:13 19.296.639 1.501.000 +1.60 Rc6xe6 Qe8xe6 Qc1c5 Qe6a6 Bg3c7 Rd8d7 Rb1b6 Qa6a5 Qc5xa5 Ra7xa5 Rb6xb7 Ra5a6

[ZirconiumX]

Albert - I am merely testing these as a sanity test for FruitFly.

Jorge - See below

[d] 3rq1k1/rb4p1/2R1npNp/3n4/3P4/p5BP/B4PPK/1RQ5 w - - 0 1

A first test to see what FruitFly would give:

Score : +2.30
Depth : 14/1
Time : 00:01:08
Nodes : 6080000
N/sec : 88975
1. Rxe6 Qxe6 2. Qc5 Qa6 3. Ne7 Kf7 4. Bxd5 Bxd5 5. Nxd5

Clear hash test #2:

Score : -0.13
Depth : 5/1
Time : 00:00:00
Nodes : 11504
N/sec : 21570
1. Rxe6 Ra6

Less than one second.

Yawn.

Next!

Matthew:out

[pichy]

Last position to solve, white to play and win, let see if FruitFly can find Rd6+
[d]1nb3rr/2pp3p/p1k2P2/n1q1PN2/P1pR3N/b4PBp/1R2P3/1KQ5 w - - 0 1

Albert - I am merely testing these as a sanity test for FruitFly.

Jorge - See below

[d] 3rq1k1/rb4p1/2R1npNp/3n4/3P4/p5BP/B4PPK/1RQ5 w - - 0 1

A first test to see what FruitFly would give:

Score : +2.30
Depth : 14/1
Time : 00:01:08
Nodes : 6080000
N/sec : 88975
1. Rxe6 Qxe6 2. Qc5 Qa6 3. Ne7 Kf7 4. Bxd5 Bxd5 5. Nxd5

Clear hash test #2:

Score : -0.13
Depth : 5/1
Time : 00:00:00
Nodes : 11504
N/sec : 21570
1. Rxe6 Ra6

Less than one second.

Yawn.

Next!

Matthew:out

[ZirconiumX]

I have to concede - you have found a weak point in FruitFly's armour...

Score : +0.87
Depth : 10/27
Time : 00:00:40
Nodes : 6310000
N/sec : 156835
1. Ne7 Qxe7 2. fxe7 Bxb2 3. Rxc4 Nxc4 4. Qxc4 Kb7 5. Bh2 Nc6 6. Kxb2 Rg7 7. Qb3 Ka8 8. f4 Nxe7 9. Qxh3

I will give it more time tomorrow - I am too tired right now - and the parents are pestering me.

I'll put in a polite request to Jim Ablett to help me with my speed crisis.

Matthew:out

[pichy]

I have to concede - you have found a weak point in FruitFly's armour...

Score : +0.87
Depth : 10/27
Time : 00:00:40
Nodes : 6310000
N/sec : 156835
1. Ne7 Qxe7 2. fxe7 Bxb2 3. Rxc4 Nxc4 4. Qxc4 Kb7 5. Bh2 Nc6 6. Kxb2 Rg7 7. Qb3 Ka8 8. f4 Nxe7 9. Qxh3

I will give it more time tomorrow - I am too tired right now - and the parents are pestering me.

I'll put in a polite request to Jim Ablett to help me with my speed

crisis.

Matthew:out

Let me give you a hint, you should probably let it run all Night

[Albert Silver]

Albert - I am merely testing these as a sanity test for FruitFly.

Matthew:out

By all means, I was replying to his comment that the positions were too easy for 2500-2600 engines, so why were they posted in the column. I run the column for people, not engines.

As a rule, the last two positions are usually more challenging, sometimes much more depending on what I get, and can provide a challenge for even 2100 players.