MESON Chess Problem Database

Problem Display
PID: 118251 (4b1K1/1NR2p2/5k2/3Q4/8/8/8/8 w - - 0 1)

Pypa, Volodimir Iosifovich

Za Ogneypori, 1989

4b1K1/1NR2p2/5k2/3Q4/8/8/8/8

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Kh7?
      • 1...Ba4
        • 2.Rxf7#
      • 1...Bb5
        • 2.Rxf7#
      • 1...Bc6
        • 2.Rxf7#
      • 1...Bd7!
    • 1.Rc6+?
      • 1...Ke7
        • 2.Qd6#
        • 2.Qd8#
      • 1...Bxc6!
    • 1.Qg5+?
      • 1...Ke6
        • 2.Re7#
      • 1...Kxg5!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Qd6#
      • 1...Kg6
        • 2.Qg5#
      • 1...Ke7
        • 2.Qd6#
      • 1...Bd7
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Vars
        • B(c);N_GUARD::R1(C),XP(b)
      • Refutation
        • B(c);
    • Try
      • R(C);CHECK
      • Refutation
        • B(c);XR(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R1(C)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • R(C);
    • Threat
      • QAR2(A)
    • Vars
      • K(a);P-FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAB1(A)
      • B(c);N_GUARD::QAR1(A),XP(b)
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