MESON Chess Problem Database

Problem Display
PID: 175289 (8/8/2R3B1/3pP1N1/2Pkb3/4p1Q1/1K6/8 w - - 0 1)

Coppens, JP

Brisbane Courier, 1920

8/8/2R3B1/3pP1N1/2Pkb3/4p1Q1/1K6/8

#2

7 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Sf3#
      • 2.Se6#
    • 1...Bh1
      • 2.Se6#
    • 1...Bc2
      • 2.Sf3#
      • 2.Se6#
    • 1...Bg2
      • 2.Se6#
    • 1...Bd3
      • 2.Sf3#
      • 2.Se6#
    • 1...Bf3
      • 2.Sxf3#
      • 2.Se6#
    • 1...e2
      • 2.Se6#
      • 2.Qc3#
  • Tries
    • 1.Qxe3+?
      • 1...Kxe5
        • 2.Sf3#
        • 2.Sf7#
        • 2.Re6#
      • 1...Kxe3!
  • Keys
    • 1.Qf3!
      • 1...Kd3
        • 2.Qd1#
      • 1...Kxe5
        • 2.Qf6#
      • 1...Bxf3
        • 2.Sxf3#
      • 1...Bxg6
        • 2.Qxd5#
      • 1...dxc4
        • 2.Qxe4#
      • 1...Bb1
        • 2.Qxd5#
      • 1...Bc2
        • 2.Qxd5#
      • 1...Bd3
        • 2.Qxd5#
      • 1...Bf5
        • 2.Qxd5#
      • 1...e2
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 2
  • Sets
    • B(c);::S(E)
  • Tries
    • Try
      • Q(B);CHECK,XP(a)
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(b);P-FLIGHT,P_SPINB(c),P_SPINP(a)::QAR2(B)
      • K(b);OGATEB,S_FLIGHT,XP(D)::QAB1(B)
      • B(c);XQ(B)::S(E),XB(c)
      • B(c);OGATE,XB(G)::QAR1(B),XP(d)
      • P(d);N_GUARD,XP(C)::QAR1(B),XB(c)
      • B(c);OGATE::QAR1(B),XP(d)
      • P(a);OGATE::QAB1(B)
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