MESON Chess Problem Database

Problem Display
PID: 202946 (6K1/3QRp2/2pb2p1/2p1P1P1/2P1k1N1/p2b2P1/1n4P1/BN1R4 w - - 0 1)

Lubton, Yehuda

Seider, Shlomo

1st HM., The Problemist, 1983

6K1/3QRp2/2pb2p1/2p1P1P1/2P1k1N1/p2b2P1/1n4P1/BN1R4

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb1
      • 2.exd6#
    • 1...Bf1
      • 2.Sc3#
      • 2.exd6#
    • 1...Bc2
      • 2.Sc3#
      • 2.exd6#
    • 1...Be2
      • 2.Sc3#
      • 2.exd6#
    • 1...Bxc4
      • 2.Sc3#
    • 1...Bxe5
      • 2.Sd2#
      • 2.Sc3#
      • 2.Rxe5#
    • 1...Bc7
      • 2.Sd2#
      • 2.Sc3#
    • 1...Bxe7
      • 2.Sd2#
      • 2.Sc3#
    • 1...Bb8
      • 2.Sd2#
      • 2.Sc3#
    • 1...Sxd1
      • 2.Sd2#
      • 2.exd6#
    • 1...Sa4
      • 2.Sd2#
      • 2.exd6#
  • Tries
    • 1.Bxb2?
      • threat
        • 2.Sd2#
        • 2.exd6#
      • 1...Bxb1
        • 2.exd6#
      • 1...Bxc4
        • 2.Sc3#
      • 1...Bxe5
        • 2.Sd2#
        • 2.Sc3#
        • 2.Rxe5#
        • 2.Qxd3#
      • 1...Bxe7
        • 2.Sd2#
        • 2.Sc3#
        • 2.Qxd3#
      • 1...Bf1
        • 2.Sc3#
        • 2.exd6#
      • 1...Bc2
        • 2.Sc3#
        • 2.exd6#
      • 1...Be2
        • 2.Sc3#
        • 2.exd6#
      • 1...Bc7
        • 2.Sd2#
        • 2.Sc3#
        • 2.Qxd3#
      • 1...Bb8
        • 2.Sd2#
        • 2.Sc3#
        • 2.Qxd3#
      • 1...axb2!
    • 1.Qxc6+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kf5!
  • Keys
    • 1.Rxf7!
      • threat
        • 2.Rf4#
      • 1...Kd4
        • 2.Rf4#
      • 1...Bxc4
        • 2.Sc3#
      • 1...Bxe5
        • 2.Sd2#
      • 1...Sxc4
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(c);XS(B)::R(K)+P(H),XB(g)
    • B(c);XP(F)::S(B)
  • Tries
    • Try
      • B(A);XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • B(c);XS(B)::R(K)+P(H),XB(g)
        • B(c);XP(F)::S(B)
      • Refutation
        • P(b);XB(A)
    • Try
      • Q(J);CHECK,XP(f)
      • Vars
        • K(d);P-FLIGHT,P_SPINB(c),P_SPINS(a)::QAR1(J)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • R(K);XP(i)
    • Threat
      • R1(K)
    • Vars
      • K(d);P-FLIGHT,P_SPINB(c),P_SPINS(a)::R(K)
      • B(c);P_PINR(K),XP(F)::S(B)
      • B(g);XP(H)::S(B)
      • S(a);XP(F)::QAB(J),XP(f)
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