MESON Chess Problem Database

Problem Display
PID: 16221 (3r1R2/2B5/2Qn1Np1/bRn3p1/5kP1/5N2/5P2/3K4 w - - 0 1)

Youngs, Joe Casey

StrateGems, 2000

3r1R2/2B5/2Qn1Np1/bRn3p1/5kP1/5N2/5P2/3K4

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8
      • 2.Bxd6#
    • 1...Rb8
      • 2.Bxd6#
    • 1...Rc8
      • 2.Bxd6#
    • 1...Rxf8
      • 2.Bxd6#
    • 1...Sb3
      • 2.Qe4#
    • 1...Sd3
      • 2.Qe4#
    • 1...Sa4
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sa6
      • 2.Qe4#
    • 1...Se6
      • 2.Qe4#
    • 1...Sb7
      • 2.Qe4#
    • 1...Sd7
      • 2.Qe4#
  • Tries
    • 1.Sh4?
      • threat
        • 2.Sxg6#
      • 1...Ke5
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...gxh4!
    • 1.Sd5+?
      • 1...Ke4
        • 2.Sb4#
        • 2.Sf4#
      • 1...Kxg4!
    • 1.Rb4+?
      • 1...Se4
        • 2.Qxe4#
      • 1...Bxb4!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sxg6#
      • 1...Sc4+
        • 2.Sd3#
      • 1...Sde4+
        • 2.Sd5#
      • 1...Sxb5+
        • 2.Sd3#
      • 1...Sf5+
        • 2.Sd3#
      • 1...Sdb7+
        • 2.Sd3#
      • 1...Sf7+
        • 2.Sd3#
      • 1...Sc8+
        • 2.Sd3#
      • 1...Se8+
        • 2.Sd3#
      • 1...Kxe5
        • 2.Qe4#
      • 1...Sce4
        • 2.Sh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 11
  • Sets
    • R(g);N_GUARD::B(H),XS(e)
    • R(g);N_GUARD,XR(I)::B(H),XS(e)
    • S(c);N_GUARD::QAR1(F)
    • S(c);N_GUARD::QAR1(F),XS(c)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C),XP(f)
      • Vars
        • K(a);N_SPINS(e),P_SPINS(c),S_FLIGHT::QAR1(F)
        • S(c);N_GUARD::QAR1(F),XS(c)
      • Refutation
        • P(d);XS(C)
    • Try
      • S(G);CHECK
      • Refutation
        • K(a);N_SPINS(e),P-FLIGHT,XP(D)
    • Try
      • R(E);CHECK
      • Vars
        • S(c);N_GUARD,N_SPINS(e),P_SPINS(c)::QAR1(F),XS(c)
      • Refutation
        • B(b);XR(E)
  • Actual
    • S(C);N_PINS(e)
    • Threat
      • S(C),XP(f)
    • Vars
      • S(e);CHECK::B(H)+S(C),DCHECK
      • S(e);CHECK,SBLOCK::R(I)+S(G),DCHECK
      • S(e);CHECK,XR(E)::B(H)+S(C),DCHECK
      • K(a);P_SPINS(c),S_FLIGHT,XS(C)::QAR1(F)
      • S(c);::R(I)+S(G),DCHECK
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