MESON Chess Problem Database

Problem Display
PID: 108192 (8/2K3p1/RBp1kpB1/3NrR2/2Q5/2q1pN2/b3n3/8 w - - 0 1)

Benoit, Marc

Tijdschrift vd KNSB, 1959

8/2K3p1/RBp1kpB1/3NrR2/2Q5/2q1pN2/b3n3/8

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Qxc6#
    • 1...Qe1
      • 2.Qxc6#
    • 1...Qb2
      • 2.Qxc6#
    • 1...Qd2
      • 2.Qxc6#
    • 1...Qd4
      • 2.Qxc6#
    • 1...Qa5
      • 2.Qxc6#
    • 1...Qb3
      • 2.Qxc6#
    • 1...Qd3
      • 2.Qxc6#
    • 1...cxd5
      • 2.Bc5#
    • 1...c5
      • 2.Ba5#
      • 2.Bxc5#
      • 2.Ba7#
  • Tries
    • 1.Sd4+?
      • 1...Qxd4
        • 2.Qxc6#
      • 1...Sxd4!
    • 1.Rxe5+?
      • 1...fxe5
        • 2.Sg5#
      • 1...Qxe5+!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Rxe5#
      • 1...cxd5+
        • 2.Bc5#
      • 1...Kxd5
        • 2.Bf7#
      • 1...Rxd5
        • 2.Re5#
      • 1...Rxf5
        • 2.Qxf5#
      • 1...Re4
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • Q(c);N_GUARD::QAR2(B),XP(f)
    • Q(c);N_GUARD,P_PINB(F)::QAR2(B),XP(f)
    • P(f);OGATEB,P_PINQ(B),P_SPINP(f),XS(C)::R(E)+B(F)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • Q(c);XS(A)::QAR2(B),XP(f)
      • Refutation
        • S(b);XS(A)
    • Try
      • R(D);CHECK,XR(e)
      • Vars
        • P(h);SBLOCK,XR(D)::S(A)
      • Refutation
        • Q(c);CHECK,XR(D)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+R(D),DCHECK,XR(e)
    • Vars
      • P(f);CHECK,OGATEB,SBLOCK,XS(C)::R(E)+B(F)
      • K(g);P_SPINR(e),S_FLIGHT,XS(C)::B(G)
      • R(e);XS(C)::QAB(B)+R(D),DCHECK
      • R(e);OGATE,P_SPINR(e),XR(D)::QAB1(B),XR(e)
      • R(e);::QAB(B)+R(D),DCHECK
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