MESON Chess Problem Database

Problem Display
PID: 224622 (8/6BB/Q5R1/3Rr1P1/3pk3/4p3/2P4K/8 w - - 0 1)

Woodard, Eugene

12th Place, St. John Globe, 1888

8/6BB/Q5R1/3Rr1P1/3pk3/4p3/2P4K/8

#2

8 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Qc6#
  • Tries
    • 1.Rxd4+?
      • 1...Kf3
        • 2.Qf1#
      • 1...Kf5
        • 2.Qf1#
        • 2.Qf6#
      • 1...Kxd4!
    • 1.Rf6+?
      • 1...Kxd5
        • 2.Qb5#
        • 2.Qc6#
      • 1...Rf5!
  • Keys
    • 1.Kg3!
      • threat
        • 2.Rxe5#
      • 1...Rxg5+
        • 2.Rgxg5#
      • 1...Kxd5
        • 2.Qc6#
      • 1...Kf5
        • 2.Rxe5#
        • 2.Qd3#
      • 1...Rxd5
        • 2.Re6#
        • 2.Qd3#
      • 1...Rf5
        • 2.Rxd4#
      • 1...Re6
        • 2.Qxe6#
      • 1...Re7
        • 2.Rgd6#
      • 1...Re8
        • 2.Rgd6#
      • 1...d3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(c);OGATEB,S_FLIGHT,XR(C)::QAB1(E)
  • Tries
    • Try
      • R(C);CHECK,XP(b)
      • Vars
        • K(c);S_FLIGHT::QAR2(E)
      • Refutation
        • K(c);P-FLIGHT,P_SPINR(d),XR(C)
    • Try
      • R(F);CHECK
      • Refutation
        • R(d);P_SPINR(d)
  • Actual
    • K(B);S_FLIGHT
    • Threat
      • R1(C),XR(d)
    • Vars
      • R(d);CHECK,OGATE,XP(D)::B(H)+R(F),XR(d)
      • K(c);OGATEB,S_FLIGHT,XR(C)::QAB1(E)
      • R(d);SBLOCK::R1(C),XP(b)
      • R(d);OGATEB::QAR2(E),XR(d)
      • R(d);N_GUARD::B(H)+R(F)
      • P(b);::QAB1(E),XP(b)
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