MESON Chess Problem Database

Problem Display
PID: 160663 (8/5Q2/6qR/4Npk1/8/8/5K2/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1996

8/5Q2/6qR/4Npk1/8/8/5K2/8

#2

4 + 3

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh6
      • 2.Qxg6#
    • 1...f4
      • 2.Qxg6#
  • Tries
    • 1.Sf3+?
      • 1...Kf4
        • 2.Qc4#
      • 1...Kg4
        • 2.Rh4#
      • 1...Kxh6!
    • 1.Rxg6+?
      • 1...Kh4
        • 2.Qh7#
      • 1...Kh5
        • 2.Qh7#
      • 1...Kf4!
  • Keys
    • 1.Kg3!
      • threat
        • 2.Qxg6#
      • 1...Kxh6+
        • 2.Qxg6#
      • 1...f4+
        • 2.Qxf4#
      • 1...Qxf7
        • 2.Sxf7#
      • 1...Qxh6
        • 2.Sf3#
      • 1...Qh5
        • 2.Rxh5#
        • 2.Qxh5#
        • 2.Qf6#
      • 1...Qh7
        • 2.Qh5#
        • 2.Qf6#
      • 1...Qa6
        • 2.Rh5#
        • 2.Qh5#
      • 1...Qb6
        • 2.Rh5#
        • 2.Qh5#
      • 1...Qc6
        • 2.Rh5#
        • 2.Qh5#
      • 1...Qd6
        • 2.Rh5#
        • 2.Qh5#
      • 1...Qe6
        • 2.Rh5#
        • 2.Qh5#
      • 1...Qf6
        • 2.Rh5#
        • 2.Qh5#
        • 2.Qxf6#
      • 1...Qg7
        • 2.Rh5#
        • 2.Qh5#
        • 2.Qxg7#
      • 1...Qg8
        • 2.Rh5#
        • 2.Qh5#
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT,XR(C)::QAR1(D),XQ(c)
    • P(a);SBLOCK::QAR1(D),XQ(c)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAR(D)
        • K(b);P-FLIGHT::R1(C)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • R(C);CHECK,XQ(c)
      • Vars
        • K(b);S_FLIGHT::QAR(D)
        • K(b);P-FLIGHT::QAR2(D)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
  • Actual
    • K(A);S_FLIGHT
    • Threat
      • QAR1(D),XQ(c)
    • Vars
      • K(b);CHECK,S_FLIGHT,XR(C)::QAR1(D),XQ(c)
      • P(a);CHECK,OGATE::QAB1(D),XP(a)
      • Q(c);XQ(D)::S(B),XQ(c)
      • Q(c);SBLOCK,XR(C)::S(B)
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