MESON Chess Problem Database

Problem Display
PID: 63296 (2Rrr3/bQ1pk2N/1pP5/1Nq5/7K/B7/B7/8 w - - 0 1)

Henry, S

Chess, 1945

2Rrr3/bQ1pk2N/1pP5/1Nq5/7K/B7/B7/8

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4+
      • 2.Bxb4#
    • 1...Qd6
      • 2.Bxd6#
    • 1...Rxc8
      • 2.Qxd7#
  • Tries
    • 1.Qc7?
      • threat
        • 2.Qe5#
      • 1...Qb4+
        • 2.Bxb4#
      • 1...Rxc8
        • 2.Qxd7#
      • 1...Qd6
        • 2.Bxd6#
        • 2.Qxd6#
      • 1...Bb8!
  • Keys
    • 1.c7!
      • threat
        • 2.Qe4#
      • 1...d5
        • 2.cxd8S#
      • 1...d6
        • 2.cxd8Q#
        • 2.cxd8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(a);CHECK,OGATEB::B(B),XQ(a)
    • Q(a);OGATE::B(B),XQ(a)
    • R(f);N_GUARD,XR(H)::QAR1(F),XP(d)
  • Tries
    • Try
      • Q(F);
      • Threat
        • QAR2(F)
      • Vars
        • Q(a);CHECK,OGATEB::B(B),XQ(a)
        • R(f);N_GUARD,XR(H)::QAR1(F),XP(d)
      • Refutation
        • B(c);
  • Actual
    • P(E);N_PINP(d)
    • Threat
      • QAR(F)
    • Vars
      • P(d);S_CUTR(g)::PXR(f)=S
      • P(d);N_SPINQ(a)::PXR(f)=Q
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