MESON Chess Problem Database

Problem Display
PID: 235662 (8/3K4/3B4/PpP5/1k6/8/PNpR4/RNQB4 w - - 0 1)

Haring, Jacobus

Mat, 1977

8/3K4/3B4/PpP5/1k6/8/PNpR4/RNQB4

#2

11 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...cxd1Q
      • 2.Qc3#
    • 1...cxd1B
      • 2.Qc3#
    • 1...cxd1R
      • 2.Qc3#
  • Tries
    • 1.Sd3+?
      • 1...Ka4
        • 2.Qa3#
      • 1...Kxa5
        • 2.Qa3#
      • 1...Kc4!
    • 1.a3+?
      • 1...Kb3
        • 2.Bxc2#
        • 2.Rd3#
        • 2.Qxc2#
      • 1...Kxa5!
  • Keys
    • 1.Bc7!
      • 1...Kxc5
        • 2.Bd6#
      • 1...cxb1Q
        • 2.a3#
      • 1...cxb1S
        • 2.Sd3#
      • 1...cxb1B
        • 2.a3#
      • 1...cxb1R
        • 2.Sd3#
        • 2.a3#
      • 1...cxd1Q
        • 2.Qc3#
      • 1...cxd1S
        • 2.Rd4#
      • 1...cxd1B
        • 2.Rd4#
        • 2.Qc3#
      • 1...cxd1R
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • P(a);OGATE,XB(D)::QAB1(C)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAR1(C)
        • K(b);S_FLIGHT,XP(H)::QAR2(C)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a)
    • Try
      • P(E);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(H)
  • Actual
    • B(J);
    • Vars
      • K(b);OGATEB,P_SPINP(a),S_FLIGHT,XP(I)::B(J)
      • P(a);XS(B)::P(E)
      • P(a);XS(B)::S(F)
      • P(a);OGATE,P_PINR(G),XB(D)::QAB1(C)
      • P(a);XB(D)::R(G)
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