MESON Chess Problem Database

Problem Display
PID: 61715 (3R4/3b3q/P2Q1pB1/K2n1r2/1p3n2/1P1kPRN1/N1p2r2/2B1b3 w - - 0 1)

Witt, Andreas

Die Schwalbe, 2005

3R4/3b3q/P2Q1pB1/K2n1r2/1p3n2/1P1kPRN1/N1p2r2/2B1b3

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sg2
      • 2.Qxd5#
    • 1...Sh3
      • 2.Qxd5#
    • 1...Sh5
      • 2.Qxd5#
  • Tries
    • 1.Qe5?
      • threat
        • 2.Qd4#
        • 2.Qe4#
      • 1...Sxe3
        • 2.Rxe3#
      • 1...Qe7
        • 2.Qd4#
      • 1...Bc3
        • 2.Qe4#
      • 1...Se2
        • 2.Qe4#
      • 1...Se6
        • 2.Qe4#
        • 2.Qxf5#
      • 1...Sc3
        • 2.Sxb4#
      • 1...Sb6
        • 2.Qxf5#
      • 1...Sc7
        • 2.Qxf5#
      • 1...Se7
        • 2.Qb5#
      • 1...fxe5!
    • 1.Qxd7?
      • threat
        • 2.Qb5#
        • 2.Qxf5#
      • 1...Qxg6
        • 2.Qb5#
      • 1...Qh3
        • 2.Qb5#
      • 1...Qh5
        • 2.Qb5#
      • 1...Qe7
        • 2.Qb5#
      • 1...Se6
        • 2.Qb5#
      • 1...Qxd7!
    • 1.exf4+?
      • 1...Rxf3
        • 2.Qxd5#
      • 1...Kd4!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qd4#
        • 2.Qc4#
      • 1...Sxe3
        • 2.Rxe3#
      • 1...Bc3
        • 2.Qc4#
      • 1...Bb5
        • 2.Qd4#
        • 2.Qxb5#
      • 1...Se2
        • 2.Qc4#
      • 1...Se6
        • 2.Qc4#
      • 1...Sc3
        • 2.Sxb4#
      • 1...Sb6
        • 2.Qxf5#
      • 1...Sc7
        • 2.Qxf5#
      • 1...Se7
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 3
  • Sets
    • S(f);N_GUARD::QAR2(I),XS(g)
  • Tries
    • Try
      • Q(I);N_PINS(g)
      • Threat
        • DUALS(2)
      • Vars
        • S(g);OGATE,P_PINQ(I),P_SPINB(j),P_SPINS(g),XP(D)::R1(E),XS(g)
        • Q(k);::QAR1(I)
        • B(a);::QAB1(I)
        • S(f);::QAB1(I)
        • S(g);N_GUARD,P_PINQ(I),P_SPINB(j),S_CUTB(a)::S(B),XP(e)
        • S(g);P_PINQ(I),P_SPINB(j)::QAB(I),XR(h)
        • S(g);OGATE,P_PINQ(I),P_SPINB(j)::QAB(I)
      • Refutation
        • P(i);XQ(I)
    • Try
      • Q(I);XB(j)
      • Threat
        • DUALS(2)
      • Vars
        • Q(k);N_SPINR(h),XB(J)::QAB(I)
        • Q(k);::QAB(I)
        • S(f);::QAB(I)
      • Refutation
        • Q(k);N_SPINS(g),XQ(I)
    • Try
      • P(D);CHECK,XS(f)
      • Vars
        • R(c);XR(E)::QAR2(I),XS(g)
      • Refutation
        • K(d);N_SPINR(h),P-FLIGHT
  • Actual
    • Q(I);N_PINS(g)
    • Threat
      • DUALS(2)
    • Vars
      • S(g);OGATE,P_PINQ(I),P_SPINB(j),P_SPINS(g),XP(D)::R1(E),XS(g)
      • B(a);::QAB1(I)
      • S(f);::QAB1(I)
      • S(g);N_GUARD,P_PINQ(I),P_SPINB(j),S_CUTB(a)::S(B),XP(e)
      • S(g);OGATE,P_PINQ(I),P_SPINB(j)::QAB(I),XR(h)
      • S(g);P_PINQ(I),P_SPINB(j)::QAB(I)
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