MESON Chess Problem Database

Problem Display
PID: 162664 (2bQ4/qppn1pp1/r4Ppn/b2Pk3/4N1R1/2P2R1K/B2N4/8 w - - 0 1)

Forster, Klaus

Die Schwalbe, 2015

2bQ4/qppn1pp1/r4Ppn/b2Pk3/4N1R1/2P2R1K/B2N4/8

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Bb6
      • 2.Qe7#
      • 2.Qe8#
    • 1...Sg8
      • 2.Rg5#
    • 1...Sc5
      • 2.Sc4#
    • 1...Sb6
      • 2.Qxc7#
    • 1...Sxf6
      • 2.Sc4#
    • 1...Sb8
      • 2.Sc4#
    • 1...Sf8
      • 2.Sc4#
    • 1...b6
      • 2.Qe7#
      • 2.Qe8#
    • 1...c6
      • 2.Qe7#
      • 2.Qe8#
  • Tries
    • 1.Rf5+?
      • 1...Sxf5
        • 2.Sf3#
      • 1...gxf5
        • 2.Sf3#
      • 1...Kxf5!
    • 1.Qxc7+?
      • 1...Rd6
        • 2.Qxd6#
      • 1...Bxc7!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Qe7#
      • 1...Kxd6
        • 2.Qe7#
      • 1...Rxd6
        • 2.Re4#
      • 1...Sxf6
        • 2.S6c4#
      • 1...Sf5
        • 2.Sxf7#
      • 1...Sg8
        • 2.Sxf7#
      • 1...Sc5
        • 2.S6c4#
      • 1...Sb6
        • 2.Re3#
      • 1...Sb8
        • 2.S6c4#
      • 1...Sf8
        • 2.S6c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::R(G)
    • S(i);P_PINR(G)::S(B)
    • S(i);P_PINR(G),S_CUTB(a),S_CUTR(c)::QAB(J),XP(h)
    • S(i);P_PINR(G),XP(I)::S(B)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • S(e);SBLOCK,XR(D)::S(B)
        • P(d);SBLOCK,XR(D)::S(B)
      • Refutation
        • K(b);P-FLIGHT,XR(D)
    • Try
      • Q(J);CHECK,XP(h)
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(J),XR(c)
      • Refutation
        • B(a);XQ(J)
  • Actual
    • S(F);
    • Threat
      • QAR2(J)
    • Vars
      • K(b);P_SPINS(i),S_FLIGHT,XS(F)::QAB1(J)
      • R(c);SBLOCK,XS(F)::R1(G)
      • S(i);P_PINR(G),XP(I)::S(F)
      • S(e);N_GUARD::S(F),XP(j)
      • S(i);P_PINR(G)::S(F)
      • S(i);P_PINR(G),S_CUTQ(f)::R(D)
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