MESON Chess Problem Database

Problem Display
PID: 22418 (3k1K2/6p1/4B3/b1p3p1/1p2pB2/7Q/2n5/1R6 w - - 0 1)

Blackburne, SS

The Times Weekly Edition, 0000

3k1K2/6p1/4B3/b1p3p1/1p2pB2/7Q/2n5/1R6

#2

5 + 8

2794 Terms & Themes of Chess Problems 1907

SOLUTION

  • SOUND
  • Sets
    • 1...Bc7
      • 2.Bxg5#
    • 1...Sa1
      • 2.Rd1#
    • 1...Sa3
      • 2.Rd1#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Qd5#
        • 2.Qxg5#
      • 1...Bc7
        • 2.Bxg5#
        • 2.Qxg5#
      • 1...Se3
        • 2.Qxg5#
      • 1...g4
        • 2.Qd5#
        • 2.Qg5#
      • 1...gxf4!
    • 1.Qh2?
      • threat
        • 2.Bxg5#
      • 1...g4
        • 2.Bg5#
      • 1...gxf4!
    • 1.Qg3?
      • threat
        • 2.Bxg5#
        • 2.Qxg5#
      • 1...g4
        • 2.Bg5#
      • 1...gxf4!
    • 1.Qh5?
      • threat
        • 2.Qe8#
        • 2.Qxg5#
      • 1...g4
        • 2.Qe8#
        • 2.Qd5#
        • 2.Qg5#
      • 1...g6
        • 2.Qxg5#
      • 1...gxf4!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Qxa5#
      • 1...Sxa3
        • 2.Rd1#
      • 1...bxa3
        • 2.Rb8#
      • 1...Bb6
        • 2.Qa8#
      • 1...Bc7
        • 2.Bxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(d);SBLOCK::B(C),XP(f)
    • S(a);N_GUARD::R(A)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAB(B),XP(f)
      • Refutation
        • P(f);XB(C)
    • Try
      • Q(B);
      • Threat
        • B(C),XP(f)
      • Vars
        • P(f);::B(C)
      • Refutation
        • P(f);XB(C)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);::B(C)
      • Refutation
        • P(f);XB(C)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(g);::QAB(B),XP(f)
      • Refutation
        • P(f);XB(C)
  • Actual
    • Q(B);
    • Threat
      • QAB(B),XB(d)
    • Vars
      • S(a);N_GUARD,XQ(B)::R(A)
      • P(b);OGATE,XQ(B)::R(A)
      • B(d);OGATE::QAR(B)
      • B(d);SBLOCK::B(C),XP(f)
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