MESON Chess Problem Database

Problem Display
PID: 87770 (8/8/8/6pQ/8/6k1/8/4K2R w K - 0 1)

Sanders, Ivor

The Problemist, 1993

8/8/8/6pQ/8/6k1/8/4K2R

#2

3 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kg2
      • 2.Qh3#
  • Tries
    • 1.Ke2?
      • threat
        • 2.Qf3#
        • 2.Qxg5#
      • 1...Kg2
        • 2.Qf3#
        • 2.Qh2#
        • 2.Qh3#
      • 1...g4
        • 2.Qh2#
      • 1...Kf4!
    • 1.Rh3+?
      • 1...Kg2
        • 2.Qg4#
      • 1...Kf4!
    • 1.Rh4?
      • threat
        • 2.Qg4#
      • 1...Kg2
        • 2.Qg4#
      • 1...g4
        • 2.Qxg4#
      • 1...gxh4!
    • 1.Qe2?
      • 1...g4
        • 2.Qf2#
      • 1...Kf4!
  • Keys
    • 1.0-0!
      • 1...g4
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAB1(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
        • P(b);::QAR1(C),XP(b)
      • Refutation
        • P(b);XR(B)
    • Try
      • Q(C);
      • Vars
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • K(A);0-0
    • Vars
      • P(b);SBLOCK::QAB1(C)
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