MESON Chess Problem Database

Problem Display
PID: 245920 (1b6/5p2/6p1/8/8/5R1K/2Q1PB2/Rb1B3k w - - 0 1)

Kopyl, Valery Volodimirovich

Sachove umeni (Ceskoslovensky sach), 2008

1b6/5p2/6p1/8/8/5R1K/2Q1PB2/Rb1B3k

#2

7 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc2
      • 2.Bxc2#
  • Tries
    • 1.Rd3?
      • threat
        • 2.Qc6#
      • 1...Bxc2
        • 2.Bxc2#
      • 1...Ba2!
    • 1.Qe4?
      • threat
        • 2.Rd3#
      • 1...Bxe4
        • 2.Bc2#
      • 1...Bd3
        • 2.Bc2#
        • 2.Rxd3#
      • 1...f5!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Rd3#
      • 1...Bf5+
        • 2.Rxf5#
      • 1...Ba2
        • 2.Rb3#
      • 1...Bd3
        • 2.Bc2#
        • 2.Rxd3#
      • 1...Be4
        • 2.Bc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(a);OGATE,XQ(C)::R(A)+B(B),XB(a)
  • Tries
    • Try
      • R(F);
      • Threat
        • QAB(C)
      • Vars
        • B(a);OGATE,XQ(C)::R(A)+B(B),XB(a)
      • Refutation
        • B(a);
    • Try
      • Q(C);
      • Threat
        • QAB(C)+R(F)
      • Vars
        • B(a);OGATEB,XQ(C)::R(A)+B(B)
      • Refutation
        • P(d);
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+R(F)
    • Vars
      • B(a);CHECK,N_GUARD::QAB(C)+R(F),XB(a)
      • B(a);N_GUARD::QAB(C)+R(F)
      • B(a);OGATEB::R(A)+B(B)
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