MESON Chess Problem Database

Problem Display
PID: 135534 (8/7Q/2p5/8/K1kp4/2p5/8/7B w - - 0 1)

Kwiatkowski, Vitaly I

Shakhmaty, 1988

8/7Q/2p5/8/K1kp4/2p5/8/7B

#2

3 + 4

145 StrateGems 2009
5454 Near Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...c2
      • 2.Qxc2#
  • Tries
    • 1.Qe4?
      • 1...Kc5
        • 2.Qxc6#
      • 1...c2
        • 2.Qxc2#
      • 1...c5!
    • 1.Qf5?
      • 1...c2
        • 2.Qxc2#
      • 1...c5
        • 2.Bd5#
      • 1...d3!
    • 1.Qg6?
      • 1...Kc5
        • 2.Qxc6#
      • 1...c2
        • 2.Qxc2#
      • 1...c5
        • 2.Qa6#
      • 1...d3!
  • Keys
    • 1.Qb1!
      • 1...Kc5
        • 2.Qb4#
      • 1...c2
        • 2.Qxc2#
      • 1...d3
        • 2.Qb4#
      • 1...c5
        • 2.Qb5#

Anticipated by 29048(1877), 110805(1922), 79228(1953), 77680(1960)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::QAR2(C),XP(a)
  • Tries
    • Try
      • Q(C);P_PINP(c)
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT::QAR1(C),XP(d)
        • P(a);OGATEB::QAR2(C),XP(a)
      • Refutation
        • P(d);
    • Try
      • Q(C);
      • Vars
        • P(a);OGATEB::QAR2(C),XP(a)
        • P(d);N_GUARD,SBLOCK::B(A)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Vars
        • K(b);P-FLIGHT::QAR1(C),XP(d)
        • P(a);OGATEB::QAR2(C),XP(a)
        • P(d);OGATE,SBLOCK::QAB(C)
      • Refutation
        • P(c);
  • Actual
    • Q(C);
    • Vars
      • K(b);P-FLIGHT::QAB1(C)
      • P(a);OGATEB::QAR2(C),XP(a)
      • P(c);SBLOCK::QAR1(C)
      • P(d);N_GUARD::QAB1(C)
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