Meson Chess Problem Database

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Problem Display

PID: 245192 (8/3N1N2/1K6/8/4k3/4P3/4Q3/8 w - - 0 1)

Pilchenko, Viacheslav Karlovich

Smena (Moscow), 1995

8/3N1N2/1K6/8/4k3/4P3/4Q3/8

#2

5 + 1

5454	Near Snap	2021
15148	Sadier Collection	2021

SOLUTION

SOUND
Tries
- 1.Kb5?
  - 1...Kd5
    - 2.Qc4#
  - 1...Kf5!
- 1.Sc5+?
  - 1...Kd5
    - 2.Qd3#
    - 2.Qa2#
  - 1...Kf5!
- 1.Sde5?
  - threat
    - 2.Qd3#
    - 2.Qf3#
  - 1...Kd5
    - 2.Qc4#
  - 1...Kf5!
- 1.Sfe5?
  - threat
    - 2.Qd3#
    - 2.Qf3#
  - 1...Kf5
    - 2.Qg4#
  - 1...Kd5!
- 1.Sg5+?
  - 1...Kd5
    - 2.Qd3#
  - 1...Kf5!
- 1.Sd8?
  - 1...Kd5
    - 2.Qd3#
  - 1...Kf5!
Keys
- 1.Sf8!
  - 1...Kd5
    - 2.Qd3#
  - 1...Kf5
    - 2.Qf3#

Anticipated by 15149(1980), 7911(1994)

This anticipates 8128(1995), 38012(2000)

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
Sets
Tries
- Try
  - K(C);P-FLIGHT
  - Vars
    - K(a);S_FLIGHT::QAB1(A)
  - Refutation
    - K(a);S_FLIGHT
- Try
  - S(D);CHECK
  - Refutation
    - K(a);S_FLIGHT
- Try
  - S(D);
  - Threat
    - DUALS(2)
  - Vars
    - K(a);S_FLIGHT::QAB1(A)
  - Refutation
    - K(a);S_FLIGHT
- Try
  - S(E);
  - Threat
    - DUALS(2)
  - Vars
    - K(a);S_FLIGHT::QAB1(A)
  - Refutation
    - K(a);S_FLIGHT
- Try
  - S(E);CHECK
  - Vars
    - K(a);S_FLIGHT::QAR2(A)
  - Refutation
    - K(a);S_FLIGHT
- Try
  - S(E);
  - Vars
    - K(a);S_FLIGHT::QAR2(A)
  - Refutation
    - K(a);S_FLIGHT
Actual
- S(D);
- Vars
  - K(a);S_FLIGHT::QAR2(A)

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).