MESON Chess Problem Database

Problem Display
PID: 2622 (4K3/3NbN2/1p1Pk2p/3p2pp/p6n/8/8/1Q1B4 w - - 0 1)

Planck, Charles

Mirror of American Sports, 1885

4K3/3NbN2/1p1Pk2p/3p2pp/p6n/8/8/1Q1B4

#2

6 + 9

3316 Chess Problem Text Book 1887
2794 Terms & Themes of Chess Problems 1907
3242 BCPS Rapid Solving (Cheltenham) 2001
15351 SCPF/BCPS Black Books 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd6
      • 2.Sd8#
    • 1...Bf6
      • 2.Sf8#
    • 1...d4
      • 2.Qe4#
  • Tries
    • 1.Sd8+?
      • 1...Kxd6
        • 2.Qxb6#
      • 1...Bxd8!
    • 1.Bg4+?
      • 1...Sf5
        • 2.Bxf5#
        • 2.Qxf5#
        • 2.Qe1#
      • 1...hxg4!
    • 1.Qg6+?
      • 1...Bf6
        • 2.Sf8#
        • 2.Qxf6#
      • 1...Sxg6!
  • Keys
    • 1.Bc2!
      • threat
        • 2.Qe1#
      • 1...Bxd6
        • 2.Sd8#
      • 1...d4
        • 2.Qa2#
      • 1...Bf6
        • 2.Sf8#
      • 1...Sg2
        • 2.Bf5#
      • 1...Sf3
        • 2.Bf5#
      • 1...Sf5
        • 2.Bxf5#
      • 1...Sg6
        • 2.Bf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(i);N_GUARD,SBLOCK,XP(C)::S(E)
    • B(i);N_GUARD,SBLOCK::S(D)
    • P(c);N_GUARD::QAR2(A)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(g);P-FLIGHT,XP(C)::QAR2(A),XP(f)
      • Refutation
        • B(i);XS(E)
    • Try
      • B(B);CHECK
      • Refutation
        • P(e);XB(B)
    • Try
      • Q(A);CHECK
      • Refutation
        • S(b);XQ(A)
  • Actual
    • B(B);
    • Threat
      • QAR(A)
    • Vars
      • B(i);N_GUARD,SBLOCK,XP(C)::S(E)
      • P(c);OGATEB::QAB(A)
      • B(i);N_GUARD,SBLOCK::S(D)
      • S(b);N_GUARD::B(B)
      • S(b);N_GUARD::B(B),XS(b)
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