MESON Chess Problem Database

Problem Display
PID: 54010 (8/8/B1pN4/3k4/1r2R1P1/1p4B1/6K1/6Q1 w - - 0 1)

Smith, Paul H

Chess Life, 1956

8/8/B1pN4/3k4/1r2R1P1/1p4B1/6K1/6Q1

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Bxc4#
    • 1...Rd4
      • 2.Qxd4#
    • 1...Rb5
      • 2.Qd4#
    • 1...Rb6
      • 2.Bc4#
      • 2.Qd4#
    • 1...Rb7
      • 2.Bc4#
      • 2.Qd4#
    • 1...Rb8
      • 2.Bc4#
      • 2.Qd4#
  • Tries
    • 1.Se8?
      • threat
        • 2.Sf6#
        • 2.Re5#
      • 1...Kxe4
        • 2.Sf6#
      • 1...Rxe4
        • 2.Sc7#
      • 1...Rd4
        • 2.Re5#
        • 2.Qxd4#
      • 1...Rb5
        • 2.Sf6#
        • 2.Qd4#
      • 1...c5!
    • 1.Qd1+?
      • 1...Rd4
        • 2.Qxd4#
      • 1...Kc5!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Sc3#
      • 1...Kxe4
        • 2.Sc3#
      • 1...Rxe4
        • 2.Sc7#
      • 1...Rxb5
        • 2.Qd4#
      • 1...cxb5
        • 2.Bb7#
      • 1...Rd4
        • 2.Qxd4#
      • 1...c5
        • 2.Bb7#
      • 1...Rc4
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD::B(F),XR(b)
    • R(b);N_GUARD::QAR1(A),XR(b)
    • R(b);N_GUARD::QAR1(A)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT,XR(D)::S(G)
        • R(b);SBLOCK,XR(D)::S(G)
      • Refutation
        • P(d);
    • Try
      • Q(A);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR1(A),XR(b)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(c);S_FLIGHT,XR(D)::S(G)
      • R(b);SBLOCK,XR(D)::S(G)
      • R(b);N_GUARD,XS(G)::QAR1(A)
      • P(d);OGATEB,XS(G)::B(F)
      • R(b);N_GUARD::QAR1(A),XR(b)
      • P(d);OGATEB::B(F)
      • R(b);SBLOCK::R1(D)
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