MESON Chess Problem Database

Problem Display
PID: 56542 (3R4/q1n1Q3/4PN2/3P1K2/Pppk1N1R/2n5/4B2b/2B5 w - - 0 1)

Witt, Andreas

Die Schwalbe, 2004

3R4/q1n1Q3/4PN2/3P1K2/Pppk1N1R/2n5/4B2b/2B5

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd5
      • 2.Qxa7#
    • 1...Sxe6
      • 2.Sxe6#
    • 1...Se8
      • 2.Qxa7#
  • Tries
    • 1.Sg2+?
      • 1...Bf4
        • 2.Be3#
      • 1...Se4!
    • 1.Qc5+?
      • 1...Kxc5
        • 2.Be3#
      • 1...Qxc5!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Se4#
        • 2.Sd7#
      • 1...Kc5
        • 2.Be3#
      • 1...Bxf4
        • 2.Qg1#
      • 1...S3xd5
        • 2.Se4#
      • 1...S7xd5
        • 2.Qxa7#
      • 1...Sxe6
        • 2.Sxe6#
      • 1...Se4
        • 2.Sxe4#
      • 1...S7b5
        • 2.Sd7#
      • 1...Sa6
        • 2.Sd7#
      • 1...Sa8
        • 2.Sd7#
      • 1...Se8
        • 2.Qxa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(g);OGATE,P_SPINS(g),XP(F)::QAB(J),XQ(f)
    • S(g);XP(H)::R(E)+S(D),DCHECK,XS(g)
    • S(g);OGATE::QAB(J),XQ(f)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • B(a);P_SPINB(a)::B(A)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(J);CHECK
      • Vars
        • K(e);S_FLIGHT,XQ(J)::B(A)
      • Refutation
        • Q(f);P_PINP(F),XQ(J)
  • Actual
    • Q(J);
    • Threat
      • DUALS(2)
    • Vars
      • K(e);S_FLIGHT::B(A)
      • B(a);N_GUARD,P_SPINB(a),XS(D)::QAB(J)
      • S(b);P_SPINS(b),XP(F)::QAB(J)+S(I)
      • S(g);OGATE,P_SPINS(g),XP(F)::QAB(J),XQ(f)
      • S(g);XP(H)::R(E)+S(D),DCHECK,XS(g)
      • S(b);::QAB(J)+S(I),XS(b)
      • S(g);::QAB(J)+S(I)
      • S(g);OGATE::QAB(J),XQ(f)
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