MESON Chess Problem Database

Problem Display
PID: 208036 (3N3n/1R3p1Q/3p2p1/2pk4/5P1P/2pP3K/1pP2B2/8 w - - 0 1)

Mason, William B

Dubuque Chess Journal, 1873

3N3n/1R3p1Q/3p2p1/2pk4/5P1P/2pP3K/1pP2B2/8

#2

9 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Rb5#
    • 1...g5
      • 2.Qe4#
      • 2.Qf5#
  • Tries
    • 1.Qh5+?
      • 1...g5
        • 2.Qf3#
      • 1...f5
        • 2.Qf3#
      • 1...gxh5!
  • Keys
    • 1.Rxb2!
      • 1...cxb2
        • 2.c4#
      • 1...c4
        • 2.Rb5#
      • 1...g5
        • 2.Qe4#
        • 2.Qf5#
      • 1...f5
        • 2.Qb7#
      • 1...f6
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB::R(G)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • P(f);P_SPINP(f)::QAB(H)
        • P(g);P_SPINP(g)::QAB(H)
      • Refutation
        • P(f);XQ(H)
  • Actual
    • R(G);XP(a)
    • Vars
      • P(b);OGATE,XR(G)::P(A)
      • P(c);OGATEB::R(G)
      • P(g);OGATE::QAB(H)
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