MESON Chess Problem Database

Problem Display
PID: 77967 (Q1b5/2Np4/1krRN3/8/p7/n1p5/R7/B1K5 w - - 0 1)

Rice, John Michael

The Tablet, 1955

(First published on Sat Jul 30 1955)

Q1b5/2Np4/1krRN3/8/p7/n1p5/R7/B1K5

#2

7 + 7

15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Ba6
      • 2.Qxa6#
    • 1...Sb5
      • 2.Sd5#
    • 1...c2
      • 2.Bd4#
    • 1...dxe6
      • 2.Rxc6#
  • Tries
    • 1.Rb2+?
      • 1...Sb5
        • 2.Sd5#
        • 2.Rxb5#
      • 1...cxb2+!
    • 1.Qxc6+?
      • 1...Ka5
        • 2.Bxc3#
        • 2.Qxc3#
        • 2.Qb6#
      • 1...Ka7
        • 2.Qa8#
        • 2.Qb6#
      • 1...dxc6!
  • Keys
    • 1.Bxc3!
      • 1...Rxd6
        • 2.Ba5#
      • 1...dxe6
        • 2.Rxc6#
      • 1...Ba6
        • 2.Qxa6#
      • 1...Bb7
        • 2.Qa5#
      • 1...Sb1
        • 2.Rb2#
      • 1...Sc2
        • 2.Ba5#
      • 1...Sc4
        • 2.Bd4#
      • 1...Sb5
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(g);N_GUARD::QAR1(G),XB(g)
    • S(a);SBLOCK::S(F)
    • P(b);OGATE::B(A)
    • P(f);N_GUARD,XS(E)::R1(D),XR(e)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • P(b);CHECK,XR(C)
    • Try
      • Q(G);CHECK,XR(e)
      • Refutation
        • P(f);P_SPINP(f),XQ(G)
  • Actual
    • B(A);P_SPINB(A),XP(b)
    • Vars
      • R(e);N_PINB(A),N_SPINR(e),XR(D)::B(A)
      • P(f);N_GUARD,XS(E)::R1(D),XR(e)
      • B(g);N_GUARD::QAR1(G),XB(g)
      • B(g);SBLOCK::QAB1(G)
      • S(a);N_GUARD::R(C)
      • S(a);N_PINB(A)::B(A)
      • S(a);SBLOCK::S(F)
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