MESON Chess Problem Database

Problem Display
PID: 64735 (B7/3Pr2q/6Q1/7p/2PRbP1K/R1B1k2N/1P2p1p1/2b1r2n w - - 0 1)

Lacny, Ludovit

1st Prize, Pravda, 1981

(First published on Fri Nov 27 1981)

B7/3Pr2q/6Q1/7p/2PRbP1K/R1B1k2N/1P2p1p1/2b1r2n

#2

11 + 10

3752 FIDE Album (1980-1982) 1988
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Bd2#
    • 1...Bd3
      • 2.Rxd3#
    • 1...Bf3
      • 2.Rd3#
    • 1...Bd5
      • 2.Rd3#
    • 1...Bc6
      • 2.Rd3#
    • 1...Bb7
      • 2.Rd3#
    • 1...Bxa8
      • 2.Rd3#
  • Tries
    • 1.Bxe1+?
      • 1...Bd3
        • 2.Raxd3#
        • 2.Rdxd3#
      • 1...Kxd4!
    • 1.Bb4+?
      • 1...Bd3
        • 2.Raxd3#
        • 2.Rdxd3#
      • 1...Kxd4!
    • 1.Ba5+?
      • 1...Bd3
        • 2.Raxd3#
        • 2.Rdxd3#
      • 1...Kxd4!
    • 1.Rd3+?
      • 1...Bxd3
        • 2.Qb6#
      • 1...Kxd3!
    • 1.Rd6?
      • threat
        • 2.Bd2#
      • 1...Kf3
        • 2.Bd2#
      • 1...Bd2
        • 2.Bxd2#
        • 2.Bd4#
      • 1...Bd3
        • 2.Rxd3#
      • 1...Bd5!
    • 1.Qg3+?
      • 1...Bf3
        • 2.Qxf3#
      • 1...Sxg3!
    • 1.d8Q?
      • threat
        • 2.Bd2#
      • 1...Kf3
        • 2.Bd2#
      • 1...Bd5
        • 2.Rd3#
      • 1...Bd2
        • 2.Bxd2#
      • 1...Bd3
        • 2.Rxd3#
      • 1...Rd7!
    • 1.d8R?
      • threat
        • 2.Bd2#
      • 1...Kf3
        • 2.Bd2#
      • 1...Bd5
        • 2.Rd3#
      • 1...Bd2
        • 2.Bxd2#
      • 1...Bd3
        • 2.Rxd3#
      • 1...Rd7!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Bd2#
      • 1...Kf3
        • 2.Bd2#
      • 1...Bd2
        • 2.Bxd2#
      • 1...Bd3
        • 2.Rd6#

This anticipates 104341(2000)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • K(f);N_GUARD,P-FLIGHT,P_SPINB(g)::R(B)+B(C)
    • B(g);N_GUARD::R1(F),XB(g)
    • B(g);N_GUARD::R1(F)
    • B(g);N_GUARD,XB(K)::R1(F)
  • Tries
    • Try
      • B(C);CHECK,XR(b)
      • Refutation
        • K(f);S_FLIGHT,XR(F)
    • Try
      • B(C);CHECK
      • Refutation
        • K(f);S_FLIGHT,XR(F)
    • Try
      • B(C);CHECK
      • Refutation
        • K(f);S_FLIGHT,XR(F)
    • Try
      • R(F);CHECK
      • Vars
        • B(g);SBLOCK,XR(F)::QAB(I)
      • Refutation
        • K(f);P-FLIGHT,P_SPINB(g),XR(F)
    • Try
      • R(F);
      • Threat
        • R(B)+B(C),DCHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINB(g)::R(B)+B(C)
        • B(g);N_GUARD::R1(F),XB(g)
      • Refutation
        • B(g);
    • Try
      • Q(I);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAR1(I),XB(g)
      • Refutation
        • S(c);XQ(I)
    • Try
      • P(J);
      • Threat
        • R(B)+B(C),DCHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINB(g)::R(B)+B(C)
        • B(g);N_GUARD::R1(F)
        • B(a);::R(B)+B(C),DCHECK,XB(a)
        • B(g);N_GUARD::R1(F),XB(g)
      • Refutation
        • R(i);
    • Try
      • P(J);
      • Threat
        • R(B)+B(C),DCHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINB(g)::R(B)+B(C)
        • B(g);N_GUARD::R1(F)
        • B(a);::R(B)+B(C),DCHECK,XB(a)
        • B(g);N_GUARD::R1(F),XB(g)
      • Refutation
        • R(i);
  • Actual
    • Q(I);
    • Threat
      • R(B)+B(C),DCHECK
    • Vars
      • K(f);P-FLIGHT,P_SPINB(g)::R(B)+B(C)
      • B(a);::R(B)+B(C),DCHECK,XB(a)
      • B(g);::QAB(I)+R(F)
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