MESON Chess Problem Database

Problem Display
PID: 160662 (8/1Kbkn2R/1Q6/6P1/8/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1996

8/1Kbkn2R/1Q6/6P1/8/8/8/8

#2

4 + 3

5454 Near Snap 2017
15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bd8
      • 2.Qc6#
  • Tries
    • 1.Rxe7+?
      • 1...Kd8
        • 2.Qxc7#
      • 1...Kxe7!
    • 1.Qxc7+?
      • 1...Ke8
        • 2.Qxe7#
      • 1...Ke6!
    • 1.Qe6+?
      • 1...Kd8
        • 2.Qxe7#
      • 1...Ke8
        • 2.Rh8#
        • 2.Qxe7#
      • 1...Kxe6!
    • 1.Qf6?
      • threat
        • 2.Qxe7#
      • 1...Kd8
        • 2.Qxe7#
      • 1...Ke8
        • 2.Qxe7#
      • 1...Bd8
        • 2.Qc6#
      • 1...Bd6!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qxe7#
      • 1...Ke6
        • 2.Rxe7#
      • 1...Kd8
        • 2.Qxe7#
      • 1...Ke8
        • 2.Qxe7#
      • 1...Bd6
        • 2.Qc8#
      • 1...Bd8
        • 2.Qc6#

Anticipated by 95783(1941)

This anticipates 164489(1996)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::QAB1(B)
  • Tries
    • Try
      • R(D);CHECK,XS(c)
      • Vars
        • K(b);P-FLIGHT,P_SPINB(a)::QAB1(B),XB(a)
      • Refutation
        • K(b);P-FLIGHT,XR(D)
    • Try
      • Q(B);CHECK,XB(a)
      • Vars
        • K(b);N_SPINS(c),OGATE,S_FLIGHT::QAR1(B),XS(c)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);N_SPINS(c),P-FLIGHT::QAB1(B),XS(c)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XS(c)
      • Vars
        • K(b);P-FLIGHT::QAB1(B),XS(c)
        • K(b);N_SPINS(c),S_FLIGHT::QAR1(B),XS(c)
        • B(a);SBLOCK::QAB1(B)
      • Refutation
        • B(a);
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XS(c)
    • Vars
      • K(b);N_SPINS(c),S_FLIGHT::R1(D),XS(c)
      • K(b);N_SPINS(c),P-FLIGHT::QAB1(B),XS(c)
      • K(b);N_SPINS(c),S_FLIGHT::QAR1(B),XS(c)
      • B(a);OGATE,SBLOCK::QAB1(B)
      • B(a);SBLOCK::QAB1(B)
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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).