MESON Chess Problem Database

Problem Display
PID: 225561 (1b6/Np6/7K/2N4Q/RP1k1P1R/n1r5/1P2BP2/8 w - - 0 1)

Kovacik, Jozef

Praca, 1955

1b6/Np6/7K/2N4Q/RP1k1P1R/n1r5/1P2BP2/8

#2

11 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf4+
      • 2.Rxf4#
    • 1...Be5
      • 2.Qxe5#
    • 1...Bxa7
      • 2.Qe5#
    • 1...Sb1
      • 2.Sb5#
    • 1...Sc2
      • 2.Sb5#
    • 1...Sc4
      • 2.Sb5#
    • 1...Sb5
      • 2.Sxb5#
    • 1...b5
      • 2.Sc6#
    • 1...b6
      • 2.Sc6#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Se6#
        • 2.Qe4#
      • 1...Bxf4+
        • 2.Rxf4#
      • 1...Rxc5
        • 2.Qd3#
      • 1...Rd3
        • 2.Qxd3#
        • 2.Qe4#
      • 1...Be5
        • 2.Qe4#
        • 2.Qxe5#
      • 1...Re3!
  • Keys
    • 1.Bc4!
      • threat
        • 2.Qd5#
      • 1...Bxf4+
        • 2.Rxf4#
      • 1...Kxc4
        • 2.b5#
      • 1...Rxc4
        • 2.Qd1#
      • 1...Sxc4
        • 2.Sb5#
      • 1...Be5
        • 2.fxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • B(e);CHECK,OGATE,P_SPINB(e),XP(F)::R(G),XB(e)
    • B(e);N_GUARD::QAB1(I),XB(e)
    • B(e);N_GUARD,XS(K)::QAB1(I)
    • S(a);N_GUARD::S(K)
    • S(a);N_GUARD::S(K),XS(a)
    • P(d);N_GUARD::S(K)
  • Tries
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • B(e);CHECK,OGATE,P_SPINB(e),XP(F)::R(G),XB(e)
        • R(b);N_GUARD,XS(H)::QAR1(I)
      • Refutation
        • R(b);
  • Actual
    • B(B);
    • Threat
      • QAR1(I)
    • Vars
      • B(e);CHECK,OGATE,P_SPINB(e),XP(F)::R(G),XB(e)
      • K(c);P-FLIGHT,XB(B)::R(D)+P(E)
      • R(b);N_GUARD,SBLOCK,XB(B)::QAR(I)
      • S(a);N_GUARD,SBLOCK,XB(B)::S(K)
      • B(e);OGATE::R(G)+P(F),XB(e)
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