MESON Chess Problem Database

Problem Display
PID: 73406 (2bR2K1/r1r3n1/2RBkN1p/1q6/4N1P1/4b3/8/Q6B w - - 0 1)

di Scala, Pascal

Phenix, 1997

2bR2K1/r1r3n1/2RBkN1p/1q6/4N1P1/4b3/8/Q6B

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Qe5#
    • 1...Qe2
      • 2.Qe5#
    • 1...Qd3
      • 2.Qe5#
    • 1...Qa4
      • 2.Qe5#
    • 1...Qc4
      • 2.Qe5#
    • 1...Qa6
      • 2.Qe5#
    • 1...Qxc6
      • 2.Qe5#
    • 1...Qb1
      • 2.Qe5#
    • 1...Qb3
      • 2.Qe5#
    • 1...Qb4
      • 2.Qe5#
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qb6
      • 2.Qe5#
    • 1...Qb7
      • 2.Qe5#
    • 1...Qb8
      • 2.Qe5#
    • 1...Bc5
      • 2.Qe5#
  • Tries
    • 1.Sc5+?
      • 1...Bxc5
        • 2.Bd5#
        • 2.Qe5#
      • 1...Qxc5!
    • 1.Bxc7+?
      • 1...Qxc6
        • 2.Qe5#
      • 1...Ke7!
    • 1.Qa2+?
      • 1...Qc4
        • 2.Qxc4#
      • 1...Qb3
        • 2.Qxb3#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Rxa2!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Qe5#
      • 1...Kxd5
        • 2.Sg5#
      • 1...Qxd5
        • 2.Qf6#
      • 1...Rxa1
        • 2.Sxc7#
      • 1...Qb2
        • 2.Bxc7#
      • 1...Bd4
        • 2.Sf4#
      • 1...Bf4
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 15
  • Sets
    • Q(b);N_GUARD::QAR1(A)
    • Q(b);N_GUARD,XR(E)::QAR1(A)
    • Q(b);N_GUARD::QAR1(A),XQ(b)
    • B(a);S_CUTQ(b)::QAR1(A)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • Q(b);XS(C)
    • Try
      • B(F);CHECK,XR(f)
      • Vars
        • Q(b);XR(E)::QAR1(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAB(A),XQ(b)
        • Q(b);N_GUARD,P_SPINQ(b)::QAB1(A),XQ(b)
      • Refutation
        • R(e);XQ(A)
  • Actual
    • S(G);
    • Threat
      • QAR1(A)
    • Vars
      • K(c);S_FLIGHT,XS(G)::B(B)+S(C)
      • Q(b);SBLOCK,XS(G)::QAR1(A)
      • R(e);N_GUARD,XQ(A)::S(G),XR(f)
      • Q(b);N_GUARD::R(E)+B(F),XR(f)
      • B(a);N_GUARD::S(G)
      • B(a);N_GUARD::S(G),XB(a)
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