MESON Chess Problem Database

Problem Display
PID: 245525 (2k5/2n2K2/1n6/3Q4/R1R5/8/8/8 w - - 0 1)

Shumarin, Vladimir Pavlovich

Kudesnik, 2004

2k5/2n2K2/1n6/3Q4/R1R5/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sa8
      • 2.Rxa8#
  • Tries
    • 1.Rxc7+?
      • 1...Kb8
        • 2.Qb7#
      • 1...Kxc7!
    • 1.Qb7+?
      • 1...Kd7
        • 2.Qxc7#
      • 1...Kd8
        • 2.Qxc7#
      • 1...Kxb7!
    • 1.Qd8+?
      • 1...Kb7
        • 2.Rxc7#
        • 2.Qxc7#
      • 1...Kxd8!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qxc7#
      • 1...Kb8
        • 2.Qxc7#
      • 1...Kd8
        • 2.Qxc7#
      • 1...Sxc4
        • 2.Ra8#
      • 1...Sd5
        • 2.Ra8#
      • 1...Sa8
        • 2.Rxa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::R(A),XS(a)
  • Tries
    • Try
      • R(B);CHECK,XS(b)
      • Vars
        • K(c);P-FLIGHT::QAR1(C)
      • Refutation
        • K(c);P-FLIGHT,XR(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR1(C),XS(b)
        • K(c);N_SPINS(b),P-FLIGHT::QAB1(C),XS(b)
      • Refutation
        • K(c);N_SPINS(b),S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(c);N_SPINS(b),P-FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C),XS(b)
    • Vars
      • K(c);N_SPINS(b),P-FLIGHT::QAB1(C),XS(b)
      • S(a);N_GUARD,XR(B)::R(A)
      • S(a);N_GUARD::R(A)
      • S(a);N_GUARD::R(A),XS(a)
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