MESON Chess Problem Database

Problem Display
PID: 90245 (4R3/ppp5/rb2P3/r1k2N1Q/p2n1P2/P1N2P2/2B5/1KR3B1 w - - 0 1)

Kofman, Rafael Moiseevich

Die Schwalbe, 1973

4R3/ppp5/rb2P3/r1k2N1Q/p2n1P2/P1N2P2/2B5/1KR3B1

#2

12 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Se4+?
      • 1...Kc4
        • 2.Se3#
      • 1...Kb5
        • 2.Bd3#
      • 1...Kc6
        • 2.Se7#
      • 1...Kd5!
    • 1.Sxd4+?
      • 1...Kd6
        • 2.Se4#
      • 1...Kc4!
  • Keys
    • 1.Sb5!
      • 1...Rxb5+
        • 2.Bb3#
      • 1...Kc4
        • 2.Se3#
      • 1...Kxb5
        • 2.Bd3#
      • 1...Kd5
        • 2.Be4#
      • 1...Kc6
        • 2.Se7#
      • 1...c6
        • 2.Sfd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(d);N_SPINS(b),P-FLIGHT::S(I)
        • K(d);N_SPINS(b),P-FLIGHT::B(D)
      • Refutation
        • K(d);N_SPINS(b),P-FLIGHT
    • Try
      • S(I);CHECK,XS(b)
      • Vars
        • K(d);S_FLIGHT::S(F)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • S(F);
    • Vars
      • R(c);CHECK,SBLOCK,XS(F)::R(B)+B(D)
      • K(d);N_SPINS(b),P-FLIGHT::S(I)
      • K(d);N_SPINS(b),P-FLIGHT,XS(F)::B(D)
      • K(d);N_SPINS(b),P-FLIGHT::B(D)
      • P(i);SBLOCK::QAR(J)+S(I)
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