MESON Chess Problem Database

Problem Display
PID: 121123 (4B3/7b/6Nk/4pQ2/4K3/8/8/8 w - - 0 1)

Rusek, Jan Andrzej

Trybuna Robotnicza, 1958

4B3/7b/6Nk/4pQ2/4K3/8/8/8

#2

4 + 3

6490 yacpdb 2009
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kg7
      • 2.Qf8#
    • 1...Bxg6
      • 2.Qxg6#
  • Tries
    • 1.Kxe5?
      • 1...Kg7
        • 2.Qf8#
      • 1...Bxg6
        • 2.Qxg6#
      • 1...Bg8!
    • 1.Qh3+?
      • 1...Kg5
        • 2.Qh4#
      • 1...Kg7!
    • 1.Qf4+?
      • 1...Kh5
        • 2.Qh4#
      • 1...Kg7
        • 2.Qf8#
      • 1...exf4!
  • Keys
    • 1.Qf6!
      • 1...Bxg6+
        • 2.Qxg6#
      • 1...Kh5
        • 2.Qh4#
      • 1...Bg8
        • 2.Sf8#

This anticipates 240471(2013)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::QAB1(B)
    • B(c);OGATE,P_PINQ(B),XS(C)::QAR1(B),XB(c)
  • Tries
    • Try
      • K(A);P-FLIGHT,XP(a)
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • B(c);OGATE,XS(C)::QAR1(B),XB(c)
      • Refutation
        • B(c);
    • Try
      • Q(B);CHECK,P_SPINS(C)
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK,P_SPINS(C)
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
        • K(b);S_FLIGHT::QAB1(B)
      • Refutation
        • P(a);XQ(B)
  • Actual
    • Q(B);P_SPINS(C)
    • Vars
      • B(c);CHECK,OGATE,P_SPINB(c),XS(C)::QAR1(B),XB(c)
      • K(b);P-FLIGHT::QAR1(B)
      • B(c);N_PINS(C)::QAR(B)+S(C)
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