MESON Chess Problem Database

Problem Display
PID: 91468 (8/1N2p3/4p3/K1R5/1p1k4/1Pp1R1Pp/2Pp2b1/Q1b2N1B w - - 0 1)

Vleugels, Johan Hubert

Probleemblad, 1987

8/1N2p3/4p3/K1R5/1p1k4/1Pp1R1Pp/2Pp2b1/Q1b2N1B

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf1
      • 2.Re4#
    • 1...Be4
      • 2.Rxe4#
    • 1...Bc6
      • 2.Rd3#
      • 2.Rc4#
    • 1...Bxb7
      • 2.Rc4#
  • Tries
    • 1.Bxg2?
      • threat
        • 2.Rd3#
        • 2.Re4#
        • 2.Rc4#
      • 1...d1Q
        • 2.Re4#
        • 2.Rc4#
      • 1...d1R
        • 2.Re4#
        • 2.Rc4#
      • 1...hxg2!
    • 1.Rcxc3?
      • threat
        • 2.Rcd3#
      • 1...Kd5
        • 2.Rc5#
      • 1...Bxb7
        • 2.Rc4#
      • 1...bxc3!
  • Keys
    • 1.Rexc3!
      • threat
        • 2.R3c4#
      • 1...Ke4
        • 2.Re3#
      • 1...Bxf1
        • 2.Rd3#
      • 1...bxc3
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(c);N_GUARD,XS(B)::R1(F)
    • B(c);N_GUARD::R1(F),XB(c)
    • B(c);XS(J)::R1(I)
  • Tries
    • Try
      • B(C);XB(c)
      • Threat
        • DUALS(3)
      • Refutation
        • P(e);XB(C)
    • Try
      • R(I);XP(d)
      • Threat
        • QAB(A)+R(I),DCHECK
      • Vars
        • K(g);P-FLIGHT,P_SPINB(c)::R1(I)
        • B(c);XS(J)::QAB(A)+R(I),DCHECK
      • Refutation
        • P(f);P_SPINP(f),XR(I)
  • Actual
    • R(F);XP(d)
    • Threat
      • QAB(A)+R(F),DCHECK
    • Vars
      • K(g);P-FLIGHT,P_SPINB(c)::R1(F)
      • B(c);XS(B)::QAB(A)+R(F),DCHECK
      • P(f);OGATEB,P_SPINP(f),XR(F)::QAR(A)
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