MESON Chess Problem Database

Problem Display
PID: 96802 (7R/6Q1/5NN1/5pkP/KB6/4P3/3R2rq/8 w - - 0 1)

Way, Charles F

The Chess Problem, 1944

7R/6Q1/5NN1/5pkP/KB6/4P3/3R2rq/8

#2

9 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf4
      • 2.exf4#
    • 1...Qh4
      • 2.Sf4#
      • 2.Se5#
      • 2.Se7#
      • 2.Sf8#
    • 1...Qxh5
      • 2.Rxh5#
    • 1...f4
      • 2.Rd5#
  • Tries
    • 1.Rxg2+?
      • 1...Qg3
        • 2.Rxg3#
      • 1...Qxg2!
  • Keys
    • 1.Be7!
      • threat
        • 2.Qh6#
      • 1...Qf4+
        • 2.exf4#
      • 1...Qh4+
        • 2.Sf4#
      • 1...Rg4+
        • 2.Se4#
      • 1...Qxh5
        • 2.Rxh5#
      • 1...f4
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(b);OGATE,P_PINB(D)::P(B),XQ(b)
    • Q(b);OGATE,XP(E)::R1(I),XQ(b)
    • P(c);OGATEB::R(A)
  • Tries
    • Try
      • R(A);CHECK,XR(a)
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::R(A),XQ(b)
      • Refutation
        • Q(b);XR(A)
  • Actual
    • B(D);
    • Threat
      • QAB1(H)
    • Vars
      • Q(b);CHECK,OGATE::P(B),XQ(b)
      • Q(b);CHECK,SBLOCK::QAR(H)+S(G)
      • R(a);CHECK,SBLOCK::B(D)+S(F),DCHECK
      • Q(b);OGATE,XP(E)::R1(I),XQ(b)
      • P(c);OGATEB::R(A)
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