MESON Chess Problem Database

Problem Display
PID: 237302 (Q7/4N3/B7/rr1p3K/n2P1p2/2p4n/4kPP1/3R1R2 w - - 0 1)

Rice, John Michael

Deutsche Schachzeitung, 1958

Q7/4N3/B7/rr1p3K/n2P1p2/2p4n/4kPP1/3R1R2

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf2
      • 2.Rfe1#
  • Tries
    • 1.Sxd5?
      • threat
        • 2.Qe8#
      • 1...Sxf2
        • 2.Rfe1#
      • 1...Sg5
        • 2.Sxf4#
      • 1...Sc5
        • 2.Sxc3#
      • 1...Rxa6!
  • Keys
    • 1.Qxd5!
      • threat
        • 2.Qe5#
      • 1...Rxa6
        • 2.Qxb5#
      • 1...Sxf2
        • 2.Rfe1#
      • 1...Sg5
        • 2.Qc4#
      • 1...Sc5
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(c);SBLOCK,XP(C)::R1(B)
  • Tries
    • Try
      • S(H);P_SPINS(H),XP(h)
      • Threat
        • QAR(I)
      • Vars
        • S(c);SBLOCK,XP(C)::R1(B)
        • S(c);N_PINS(H)::S(H),XP(e)
        • S(d);N_PINS(H)::S(H),XP(b)
      • Refutation
        • R(f);N_SPINR(g),XB(G)
  • Actual
    • Q(I);P_SPINQ(I),XP(h)
    • Threat
      • QAR(I)
    • Vars
      • R(f);N_GUARD,N_SPINR(g),XB(G)::QAB(I),XR(g)
      • S(c);SBLOCK,XP(C)::R1(B)
      • S(c);N_PINQ(I)::QAB(I)
      • S(d);N_PINQ(I)::QAB1(I)
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