MESON Chess Problem Database

Problem Display
PID: 90171 (2b2R2/r4p2/p1BP2N1/3rPNP1/4k1p1/8/6K1/2B2Q2 w - - 0 1)

Wessels, Martin

Die Schwalbe, 1999

2b2R2/r4p2/p1BP2N1/3rPNP1/4k1p1/8/6K1/2B2Q2

#2

10 + 7

3713 Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf5
      • 2.Qc4#
    • 1...g3
      • 2.Qf3#
    • 1...fxg6
      • 2.Qe2#
  • Tries
    • 1.Se3?
      • threat
        • 2.Qc4#
      • 1...Kd4
        • 2.Qc4#
      • 1...fxg6!
    • 1.Sgh4?
      • threat
        • 2.Qe2#
      • 1...Kxe5
        • 2.Qe2#
        • 2.Qe1#
      • 1...Bxf5!
    • 1.Bd2?
      • threat
        • 2.Qb1#
      • 1...Bxf5
        • 2.Qc4#
      • 1...fxg6
        • 2.Qe2#
      • 1...Rb7!
    • 1.Rxf7?
      • threat
        • 2.Qe2#
        • 2.Qc4#
      • 1...Bxf5
        • 2.Qc4#
      • 1...Rxf7!
    • 1.Qd1?
      • threat
        • 2.Sg3#
        • 2.Qc2#
      • 1...Bxf5
        • 2.Bxd5#
        • 2.Qxd5#
      • 1...fxg6
        • 2.Qe2#
        • 2.Qd4#
        • 2.Qxd5#
      • 1...g3
        • 2.Sxg3#
        • 2.Qc2#
        • 2.Qf3#
      • 1...Kxf5!
    • 1.Qf2?
      • threat
        • 2.Qc2#
      • 1...Bxf5
        • 2.Qe3#
      • 1...fxg6
        • 2.Qe3#
        • 2.Qd4#
        • 2.Qe2#
      • 1...Kd3!
  • Keys
    • 1.Bb2!
      • threat
        • 2.Qb1#
      • 1...Bxf5
        • 2.Qe2#
      • 1...fxg6
        • 2.Qc4#

Anticipated by 15829(1988)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • B(g);SBLOCK,XS(E)::QAR2(B)
    • P(b);N_GUARD::QAB1(B)
    • P(f);XS(I)::QAR2(B)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR2(B)
      • Vars
        • K(a);N_SPINR(c),P-FLIGHT::QAR1(B)
      • Refutation
        • P(f);XS(I)
    • Try
      • S(I);
      • Threat
        • QAR2(B)
      • Refutation
        • B(g);XS(E)
    • Try
      • B(A);
      • Threat
        • QAB(B)
      • Vars
        • B(g);SBLOCK,XS(E)::QAR2(B)
        • P(f);XS(I)::QAR2(B)
      • Refutation
        • R(e);
    • Try
      • R(J);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • B(g);XS(E)::QAR2(B)
      • Refutation
        • R(e);XR(J)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);N_SPINR(c),P_SPINP(f),S_FLIGHT,XS(E)
    • Try
      • Q(B);
      • Threat
        • QAB(B)
      • Vars
        • B(g);SBLOCK,XS(E)::QAR1(B)
      • Refutation
        • K(a);N_SPINR(c),S_FLIGHT
  • Actual
    • B(A);
    • Threat
      • QAB(B)
    • Vars
      • B(g);SBLOCK,XS(E)::QAR2(B)
      • P(f);XS(I)::QAR2(B)
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