MESON Chess Problem Database

Problem Display
PID: 11900 (4K2B/P1p5/rnp4R/2k1p1Rp/BpNp4/2n2b1r/3N1Q2/b5q1 w - - 0 1)

Fleck, Ferenc

3rd HM., KeyStip 08. Ty., 1973

4K2B/P1p5/rnp4R/2k1p1Rp/BpNp4/2n2b1r/3N1Q2/b5q1

#2

9 + 14

5454 Near Snap 1973

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Rxe5#
    • 1...Bd5
      • 2.Qf8#
    • 1...Scd5
      • 2.Rxc6#
  • Tries
    • 1.Rxe5+?
      • 1...Bd5
        • 2.Rxc6#
        • 2.Qf8#
      • 1...Scd5
        • 2.Rxc6#
      • 1...Sbd5!
    • 1.Rxc6+?
      • 1...Kd5
        • 2.Rxe5#
      • 1...Bxc6+!
  • Keys
    • 1.Bxe5!
      • threat
        • 2.Bxd4#
        • 2.Bd6#
      • 1...Kd5
        • 2.Bg3#
      • 1...Qxf2
        • 2.Bd6#
      • 1...Qxg5
        • 2.Qxd4#
      • 1...Sxc4
        • 2.Bxd4#
      • 1...b3
        • 2.Bd6#
      • 1...Qe1
        • 2.Qxd4#
      • 1...Bd5
        • 2.Bxd4#
        • 2.Qf8#
      • 1...Scd5
        • 2.Rxc6#
      • 1...Sbd5
        • 2.Bxd4#

This anticipates 12158(1975)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • K(h);N_SPINP(g),P-FLIGHT,P_SPINP(i)::R1(E),XP(i)
    • B(d);OGATE,SBLOCK::QAB(B)
    • S(c);SBLOCK,S_CUTB(d)::R1(F),XP(m)
  • Tries
    • Try
      • R(E);CHECK,XP(i)
      • Vars
        • S(c);P_SPINS(c)::R1(F),XP(m)
      • Refutation
        • S(l);P_SPINS(l)
    • Try
      • R(F);CHECK,XP(m)
      • Vars
        • K(h);N_SPINP(g),P-FLIGHT,P_SPINP(i)::R1(E),XP(i)
      • Refutation
        • B(d);CHECK,XR(F)
  • Actual
    • B(I);XP(i)
    • Threat
      • DUALS(2)
    • Vars
      • K(h);N_SPINP(g),P-FLIGHT::R(E)+B(I)
      • Q(b);N_SPINP(g),XQ(B)::R(E)+B(I),DCHECK
      • Q(b);N_GUARD,XR(E)::QAB1(B),XP(g)
      • S(l);XS(D)::R(E)+B(I),DCHECK,XP(g)
      • P(f);::R(E)+B(I),DCHECK
      • Q(b);N_GUARD,P_PINB(I)::QAB1(B),XP(g)
      • S(c);SBLOCK,S_CUTB(d)::R1(F),XP(m)
      • S(l);::B(I),XP(g)
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