MESON Chess Problem Database

Problem Display
PID: 10269 (1BR4K/7p/3p1N1r/Qb2k3/3N2P1/3P2P1/B4P2/qr6 w - - 0 1)

Lender, Baruch

2nd Comm., Israel Ring Ty., 1963

1BR4K/7p/3p1N1r/Qb2k3/3N2P1/3P2P1/B4P2/qr6

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Sd7#
    • 1...Rxf6
      • 2.Sc6#
  • Tries
    • 1.Rc5+?
      • 1...Kxd4
        • 2.Rd5#
      • 1...Kxf6!
    • 1.Qd2?
      • threat
        • 2.Qf4#
      • 1...Kxd4
        • 2.Qe3#
      • 1...Qxd4
        • 2.Qg5#
      • 1...Rxf6
        • 2.Qe3#
      • 1...Kxf6!
    • 1.Qd8?
      • threat
        • 2.Sf3#
        • 2.Qxd6#
      • 1...Kxd4
        • 2.Qxd6#
      • 1...Qxd4
        • 2.Qe7#
      • 1...Qxa2
        • 2.Qxd6#
      • 1...Rb3
        • 2.Qxd6#
      • 1...Bc4
        • 2.Qxd6#
      • 1...Bc6
        • 2.Sxc6#
        • 2.Qxd6#
      • 1...Bd7
        • 2.Sf3#
      • 1...Rxf6!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qxd6#
      • 1...Kxd4
        • 2.Qxd6#
      • 1...Kxf6
        • 2.Qg7#
      • 1...Qxd4
        • 2.Qe7#
      • 1...Rxf6
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(a);SBLOCK,XS(E)::S(H)
    • R(f);SBLOCK,XS(H)::S(E)
  • Tries
    • Try
      • R(J);CHECK,N_PINB(c)
      • Vars
        • K(d);N_SPINP(e),S_FLIGHT,XS(E)::R1(J)
      • Refutation
        • K(d);N_SPINP(e),S_FLIGHT,XS(H)
    • Try
      • Q(G);N_PINB(c)
      • Threat
        • QAB1(G)
      • Vars
        • K(d);N_SPINP(e),S_FLIGHT,XS(E)::QAB1(G)
        • Q(a);SBLOCK,XS(E)::QAR2(G)
        • R(f);SBLOCK,XS(H)::QAR2(G)
      • Refutation
        • K(d);N_SPINP(e),S_FLIGHT,XS(H)
    • Try
      • Q(G);N_PINB(c)
      • Threat
        • DUALS(2)
      • Vars
        • K(d);S_FLIGHT,XS(E)::QAR2(G),XP(e)
        • Q(a);SBLOCK,XS(E)::QAR2(G)
        • Q(a);XB(A)::QAB1(G),XP(e)
        • R(b);::QAB1(G),XP(e)
        • B(c);::QAB1(G),XP(e)
        • B(c);::S(E)
      • Refutation
        • R(f);XS(H)
  • Actual
    • Q(G);N_PINB(c)
    • Threat
      • QAB1(G),XP(e)
    • Vars
      • K(d);N_SPINP(e),S_FLIGHT,XS(E)::QAR2(G),XP(e)
      • K(d);N_SPINP(e),OGATEB,S_FLIGHT,XS(H)::QAB1(G)
      • Q(a);SBLOCK,XS(E)::QAR2(G)
      • R(f);SBLOCK,XS(H)::QAR2(G)
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