MESON Chess Problem Database

Problem Display
PID: 263213 (3rB2N/P7/Q2p1k1B/1pR1R3/2N1P3/4P3/8/3K4 w - - 0 1)

Lipton, Michael

Comm., Lancia MT (L'Italia Scacchistica), 1961

3rB2N/P7/Q2p1k1B/1pR1R3/2N1P3/4P3/8/3K4

#2

11 + 4

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8
      • 2.Qxd6#
    • 1...Rb8
      • 2.Qxd6#
    • 1...Rc8
      • 2.Qxd6#
  • Tries
    • 1.Sxd6?
      • 1...Rxd6+
        • 2.Qxd6#
      • 1...Rxe8
        • 2.Sxe8#
      • 1...Ra8
        • 2.Sc4#
        • 2.Sxb5#
        • 2.Sf5#
        • 2.Sb7#
        • 2.Sdf7#
        • 2.Sc8#
      • 1...Rb8
        • 2.Sb7#
      • 1...Rc8
        • 2.Sxc8#
      • 1...b4
        • 2.Qf1#
      • 1...Rd7!
    • 1.Rc7?
      • threat
        • 2.Bg5#
        • 2.Bg7#
        • 2.Rf7#
      • 1...bxc4
        • 2.Bg7#
      • 1...Rd7!
    • 1.Rf5+?
      • 1...Ke6
        • 2.Rce5#
      • 1...Ke7!
  • Keys
    • 1.Sb6!
      • 1...dxc5+
        • 2.Sd7#
      • 1...dxe5+
        • 2.Sd5#
      • 1...Rxe8
        • 2.Sd7#
      • 1...d5
        • 2.Sd7#
      • 1...Rd7
        • 2.Sxd7#
      • 1...Ra8
        • 2.Sd7#
      • 1...Rb8
        • 2.Sd7#
      • 1...Rc8
        • 2.Sd7#
      • 1...b4
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(d);N_GUARD::QAR2(G),XP(b)
  • Tries
    • Try
      • S(C);P_SPINS(C),XP(b)
      • Vars
        • R(d);CHECK,OGATE,P_SPINR(d),XS(C)::QAR2(G),XR(d)
        • R(d);N_PINS(C),XB(J)::QAR(G)+S(C),DCHECK,XR(d)
        • R(d);N_PINS(C)::QAR(G)+S(C)
        • R(d);N_PINS(C)::QAR(G)+S(C),XR(d)
        • P(a);OGATE::QAR(G)
      • Refutation
        • R(d);
    • Try
      • R(E);
      • Threat
        • DUALS(3)
      • Vars
        • P(a);XS(C)::B(H)
      • Refutation
        • R(d);
    • Try
      • R(F);CHECK
      • Vars
        • K(c);P-FLIGHT::R1(E)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
  • Actual
    • S(C);N_PINP(b)
    • Vars
      • P(b);CHECK,XR(E)::QAR(G)+S(C),DCHECK
      • P(b);CHECK,SBLOCK,XR(F)::QAR(G)+S(C),DCHECK
      • R(d);N_GUARD,XB(J)::S(C)
      • P(b);::QAR(G)+S(C),DCHECK
      • R(d);N_GUARD::S(C),XR(d)
      • R(d);N_GUARD::S(C)
      • P(a);OGATE::QAR(G)
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