MESON Chess Problem Database

Problem Display
PID: 107921 (8/2Q5/8/rpp1R1K1/pPBk4/8/8/N7 w - - 0 1)

Cogswell, TA

Checkmate, 1901

8/2Q5/8/rpp1R1K1/pPBk4/8/8/N7

#2

6 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Re4+?
      • 1...Kxe4
        • 2.Qf4#
      • 1...Kc3!
    • 1.Rd5+?
      • 1...Ke3
        • 2.Qf4#
      • 1...Kxc4
        • 2.Qxc5#
      • 1...Ke4
        • 2.Qf4#
      • 1...Kc3!
  • Keys
    • 1.Re3!
      • threat
        • 2.Qf4#
        • 2.Qxc5#
      • 1...Kxe3
        • 2.Qf4#
      • 1...Kxc4
        • 2.Qxc5#
      • 1...bxc4
        • 2.Qe5#
      • 1...cxb4
        • 2.Sc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(b);P-FLIGHT,XR(D)::QAR1(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(F)
        • K(b);P-FLIGHT,P_SPINP(e),XB(C)::QAR1(F),XP(e)
        • K(b);P-FLIGHT::QAR1(F)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(D);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);S_FLIGHT,XR(D)::QAB1(F)
      • K(b);P-FLIGHT,P_SPINP(e),XB(C)::QAR1(F),XP(e)
      • P(d);SBLOCK,XB(C)::QAB1(F)
      • P(e);XP(B)::S(A)
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