MESON Chess Problem Database

Problem Display
PID: 172263 (8/8/8/4Q3/2p5/p7/1P6/k1K5 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kubanski novosti, 1996

8/8/8/4Q3/2p5/p7/1P6/k1K5

#2

3 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...axb2+
      • 2.Qxb2#
  • Tries
    • 1.Qa5?
      • threat
        • 2.Qxa3#
      • 1...Ka2
        • 2.Qxa3#
      • 1...a2!
    • 1.bxa3+?
      • 1...Ka2
        • 2.Qb2#
      • 1...c3!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qxa3#
      • 1...axb2+
        • 2.Qxb2#
      • 1...Ka2
        • 2.Qxa3#
      • 1...a2
        • 2.b3#
        • 2.b4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);CHECK,OGATE,P_SPINP(b),XP(B)::QAB1(C),XP(b)
  • Tries
    • Try
      • Q(C);P_PINP(b)
      • Threat
        • QAR2(C),XP(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(C),XP(b)
      • Refutation
        • P(b);
    • Try
      • P(B);CHECK,XP(b)
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • Q(C);
    • Threat
      • QAR2(C),XP(b)
    • Vars
      • P(b);CHECK,OGATE,P_SPINP(b),XP(B)::QAB1(C),XP(b)
      • K(a);P-FLIGHT::QAR1(C),XP(b)
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