MESON Chess Problem Database

Problem Display
PID: 2749 (6Qb/4pn2/N3p2p/2p1k2P/2PR4/BP5N/5K2/1B6 w - - 0 1)

Thursby, John Ormerod Scarlett

Source?, 0000

6Qb/4pn2/N3p2p/2p1k2P/2PR4/BP5N/5K2/1B6

#2

10 + 7

3357 75 Chess Problems 1883

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Bb2#
    • 1...Bg7
      • 2.Qxg7#
    • 1...Sg5
      • 2.Qxh8#
    • 1...Sd6
      • 2.Qxh8#
    • 1...Sd8
      • 2.Qxh8#
  • Tries
    • 1.Bb2?
      • threat
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rd5#
        • 2.Rd7#
        • 2.Rd8#
      • 1...Kf6
        • 2.Rf4#
      • 1...Sd6
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rf4#
        • 2.Rg4#
        • 2.Rh4#
        • 2.Rd5#
        • 2.Qxh8#
      • 1...Sd8
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rd5#
        • 2.Rd7#
        • 2.Rxd8#
        • 2.Qxh8#
      • 1...cxd4!
    • 1.Bxc5?
      • 1...Bf6
        • 2.Qg3#
      • 1...Bg7
        • 2.Qxg7#
      • 1...Sg5
        • 2.Qxh8#
      • 1...Sd6
        • 2.Qxh8#
      • 1...Sd8
        • 2.Qxh8#
      • 1...Kf6!
    • 1.Re4+?
      • 1...Kf5
        • 2.Qg6#
      • 1...Kf6
        • 2.Qg6#
      • 1...Kd6!
    • 1.Rd5+?
      • 1...Kf6
        • 2.Qg6#
      • 1...exd5!
    • 1.Qxf7?
      • threat
        • 2.Qf4#
      • 1...Kxd4
        • 2.Bb2#
      • 1...Bf6!
    • 1.Qg3+?
      • 1...Kxd4
        • 2.Bb2#
        • 2.Bxc5#
        • 2.Qe3#
      • 1...Kf6!
    • 1.Qb8+?
      • 1...Kxd4
        • 2.Bb2#
      • 1...Sd6
        • 2.Qxh8#
      • 1...Kf6!
  • Keys
    • 1.Sb8!
      • 1...Kxd4
        • 2.Bb2#
      • 1...Kf6
        • 2.Sd7#
      • 1...cxd4
        • 2.Sd7#
      • 1...Bf6
        • 2.Sc6#
      • 1...Bg7
        • 2.Qxg7#
      • 1...Sg5
        • 2.Qxh8#
      • 1...Sd6
        • 2.Qxh8#
      • 1...Sd8
        • 2.Qxh8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XR(G)::B(C)
    • B(g);N_GUARD::QAB(J),XB(g)
    • S(f);N_GUARD::QAB(J),XB(g)
  • Tries
    • Try
      • B(C);
      • Threat
        • DUALS(5)
      • Vars
        • K(b);S_FLIGHT::B(C)+R(G),DCHECK
      • Refutation
        • P(a);P_SPINP(a),XR(G)
    • Try
      • B(C);XP(a)
      • Vars
        • B(g);SBLOCK::QAB(J)
        • B(g);N_GUARD::QAB(J),XB(g)
        • S(f);N_GUARD::QAB(J),XB(g)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(G);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(J)
        • K(b);S_FLIGHT::QAR1(J)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • R(G);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(J)
      • Refutation
        • P(c);XR(G)
    • Try
      • Q(J);XS(f)
      • Threat
        • QAB1(J)
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(G)::B(C)
      • Refutation
        • B(g);
    • Try
      • Q(J);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(J);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(G)::B(C)
        • S(f);N_GUARD,P_SPINS(f)::QAB(J),XB(g)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(I);
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(G)::B(C)
      • K(b);S_FLIGHT::S(I)
      • P(a);SBLOCK,XR(G)::S(I)
      • B(g);SBLOCK::S(I)
      • B(g);N_GUARD::QAB(J),XB(g)
      • S(f);N_GUARD::QAB(J),XB(g)
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