MESON Chess Problem Database

Problem Display
PID: 172257 (8/6Pr/8/8/4KQPk/7p/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kubanski krai, 1996

8/6Pr/8/8/4KQPk/7p/8/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rh5
      • 2.g5#
    • 1...Rh8
      • 2.gxh8Q#
      • 2.gxh8R#
  • Tries
    • 1.Kf3?
      • threat
        • 2.Qf6#
      • 1...Rxg7
        • 2.Qh6#
      • 1...Rh5
        • 2.g5#
      • 1...Rh6
        • 2.Qxh6#
      • 1...h2!
  • Keys
    • 1.Kf5!
      • threat
        • 2.Qf2#
      • 1...Rh5+
        • 2.g5#
      • 1...h2
        • 2.Qxh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK::QAR(B)+P(C)
    • R(c);OGATE::PXR(c)=Q
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAB(B)
      • Vars
        • R(c);N_GUARD,XP(D)::QAR2(B)
        • R(c);SBLOCK::QAR(B)+P(C)
        • R(c);N_GUARD::QAR2(B),XR(c)
      • Refutation
        • P(a);
  • Actual
    • K(A);S_FLIGHT
    • Threat
      • QAB(B)
    • Vars
      • R(c);CHECK,SBLOCK::QAR(B)+P(C)
      • P(a);OGATEB::QAR2(B),XP(a)
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