MESON Chess Problem Database

Problem Display
PID: 105462 (4Q2R/5r1b/6k1/5N2/6K1/8/8/8 w - - 0 1)

Pypa, Volodimir Iosifovich

Sinfonie Scacchistiche, 1978

4Q2R/5r1b/6k1/5N2/6K1/8/8/8

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bg8
      • 2.Rh6#
  • Tries
    • 1.Rxh7?
      • threat
        • 2.Rh6#
        • 2.Qxf7#
      • 1...Kf6
        • 2.Rh6#
      • 1...Kxh7!
    • 1.Qg8+?
      • 1...Rg7
        • 2.Qe6#
        • 2.Qxg7#
      • 1...Bxg8
        • 2.Rh6#
      • 1...Kf6!
  • Keys
    • 1.Kf4!
      • 1...Kh5
        • 2.Qxf7#
      • 1...Kf6
        • 2.Qc6#
      • 1...Bg8
        • 2.Rh6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(c);OGATE::R1(D)
  • Tries
    • Try
      • R(D);XB(c)
      • Threat
        • DUALS(2)
      • Vars
        • K(a);N_SPINR(b),P-FLIGHT::R(D)
      • Refutation
        • K(a);N_SPINR(b),S_FLIGHT,XR(D)
    • Try
      • Q(C);CHECK,N_PINR(b)
      • Vars
        • B(c);OGATE,XQ(C)::R1(D)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • K(A);P-FLIGHT,P_SPINS(B)
    • Vars
      • K(a);P_SPINB(c),S_FLIGHT::QAB(C),XR(b)
      • K(a);N_PINS(B),N_SPINR(b),P-FLIGHT::QAR(C)
      • B(c);OGATE::R1(D)
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