MESON Chess Problem Database

Problem Display
PID: 172541 (K1Q5/8/1kp5/RP6/8/8/2P5/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 2003

K1Q5/8/1kp5/RP6/8/8/2P5/8

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...cxb5
      • 2.Ra6#
    • 1...c5
      • 2.Qd8#
  • Tries
    • 1.Ra4?
      • threat
        • 2.Qxc6#
      • 1...Kc5
        • 2.Qxc6#
      • 1...cxb5
        • 2.Ra6#
      • 1...c5
        • 2.Qb7#
        • 2.Qc6#
        • 2.Qb8#
      • 1...Kxb5!
  • Keys
    • 1.c3!
      • 1...Kxa5
        • 2.Qa6#
      • 1...Kc5
        • 2.Qxc6#
      • 1...cxb5
        • 2.Ra6#
      • 1...c5
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK,XP(C)::R1(B)
    • P(b);SBLOCK::QAB(E)
  • Tries
    • Try
      • R(B);
      • Threat
        • QAR1(E),XP(b)
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::QAR1(E),XP(b)
        • P(b);SBLOCK,XP(C)::R1(B)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
  • Actual
    • P(A);
    • Vars
      • K(a);S_FLIGHT,XR(B)::QAR1(E)
      • K(a);P_SPINP(b),S_FLIGHT::QAR1(E),XP(b)
      • P(b);SBLOCK,XP(C)::R1(B)
      • P(b);SBLOCK::QAB(E)
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