MESON Chess Problem Database

Problem Display
PID: 251648 (3NR3/b7/3rP3/5Np1/R2PkPP1/4PpP1/K1P2P2/7Q w - - 0 1)

Biscan, Dragutin

Probleemblad, 1982

3NR3/b7/3rP3/5Np1/R2PkPP1/4PpP1/K1P2P2/7Q

#2

14 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qxf3#
  • Tries
    • 1.Sh4?
      • threat
        • 2.Qxf3#
      • 1...Kd5
        • 2.Qxf3#
      • 1...gxh4!
    • 1.Qb1?
      • threat
        • 2.c4#
      • 1...Kd5
        • 2.c4#
      • 1...Rxd4
        • 2.Qb7#
      • 1...Rb6!
    • 1.d5+?
      • 1...Bd4
        • 2.Rxd4#
      • 1...Kxd5!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Se7#
      • 1...Kd5
        • 2.Se7#
      • 1...Rxe6
        • 2.Qb7#
      • 1...Rd5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);N_GUARD,S_FLIGHT::QAB(A),XP(a)
  • Tries
    • Try
      • S(K);
      • Threat
        • QAB1(A),XP(a)
      • Vars
        • K(b);S_FLIGHT::QAB(A),XP(a)
      • Refutation
        • P(c);XS(K)
    • Try
      • Q(A);N_PINP(a)
      • Threat
        • QAB(A)+P(C)
      • Vars
        • K(b);S_FLIGHT::P(C)
        • R(d);N_GUARD,P_SPINR(d),XP(H)::QAB(A)
      • Refutation
        • R(d);
    • Try
      • P(H);CHECK
      • Vars
        • B(e);N_GUARD,P_SPINB(e)::R1(G),XB(e)
      • Refutation
        • K(b);S_FLIGHT,XP(H)
  • Actual
    • Q(A);N_PINP(a)
    • Threat
      • QAB(A)+S(K)
    • Vars
      • K(b);S_FLIGHT::S(K)
      • R(d);N_GUARD,P_SPINR(d),XP(L)::QAB(A)
      • R(d);SBLOCK::QAB(A)+S(K),DCHECK
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