MESON Chess Problem Database

Problem Display
PID: 262076 (Q3r1BB/1p2R2P/2P1N2K/2P5/1Rb1kp2/1N3p2/2PnrP2/8 w - - 0 1)

Murashev, Pavel Aleksandrovich

Schweizerische Schachzeitung, 2007

Q3r1BB/1p2R2P/2P1N2K/2P5/1Rb1kp2/1N3p2/2PnrP2/8

#2

13 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa8
      • 2.Sg7#
    • 1...Rb8
      • 2.Sg7#
    • 1...Rc8
      • 2.Sg7#
    • 1...Rd8
      • 2.Sg7#
    • 1...Rf8
      • 2.Sg7#
  • Tries
    • 1.Qb8?
      • threat
        • 2.Qe5#
      • 1...Kf5
        • 2.Qxf4#
      • 1...Rxb8
        • 2.Sg7#
      • 1...Kd5!
    • 1.Qxe8?
      • threat
        • 2.Sg7#
      • 1...Kd5
        • 2.Sxf4#
        • 2.Sc7#
      • 1...Kf5
        • 2.Qg6#
      • 1...Sxb3!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Sg5#
      • 1...Kd5
        • 2.Sxf4#
      • 1...Kf5
        • 2.Sed4#
      • 1...Rxc8
        • 2.Sg7#
      • 1...Rxg8
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(h);N_GUARD,XQ(K)::R(I)+S(G)
    • R(h);N_GUARD::R(I)+S(G)
  • Tries
    • Try
      • Q(K);
      • Threat
        • QAR1(K)
      • Vars
        • K(e);N_GUARD,N_SPINB(d),S_FLIGHT::QAR1(K),XP(f)
        • R(h);N_GUARD,XQ(K)::R(I)+S(G)
      • Refutation
        • K(e);N_SPINB(d),S_FLIGHT
    • Try
      • Q(K);XR(h)
      • Threat
        • R(I)+S(G)
      • Vars
        • K(e);N_GUARD,N_SPINB(d),S_FLIGHT::QAB1(K)
      • Refutation
        • S(a);XS(C)
  • Actual
    • Q(K);
    • Threat
      • R(I)+S(G),DCHECK
    • Vars
      • K(e);N_GUARD,N_SPINB(d),S_FLIGHT::B(L)+S(G),DCHECK,XP(f)
      • K(e);N_SPINB(d),S_FLIGHT::QAB(K)+S(G),DCHECK
      • R(h);N_GUARD,XQ(K)::R(I)+S(G)
      • R(h);N_GUARD,XB(L)::R(I)+S(G)
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