MESON Chess Problem Database

Problem Display
PID: 175639 (8/8/2K5/2Np4/2kpb3/2p5/1R4Q1/8 w - - 0 1)

Belcher, Charles D

Philadelphia Times, 1900

8/8/2K5/2Np4/2kpb3/2p5/1R4Q1/8

#2

4 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qxd5#
    • 1...Bc2
      • 2.Qxd5#
    • 1...Bd3
      • 2.Qxd5#
    • 1...Bf5
      • 2.Qxd5#
    • 1...Bg6
      • 2.Qxd5#
    • 1...Bh7
      • 2.Qxd5#
  • Tries
    • 1.Qf1+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...d3!
    • 1.Qc2?
      • threat
        • 2.Qb3#
        • 2.Qa4#
      • 1...d3
        • 2.Qa4#
      • 1...Bxc2!
    • 1.Qe2+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...d3!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Se5#
      • 1...Kxd3
        • 2.Qe2#
      • 1...Bxd3
        • 2.Qxd5#
      • 1...cxb2
        • 2.Qc2#
      • 1...c2
        • 2.Qxc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • B(d);OGATE::QAB1(B),XP(e)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • B(d);N_GUARD,P_SPINB(d)::QAB1(B),XB(d)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(B);P_PINP(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAR2(B)
      • Refutation
        • B(d);N_SPINP(a),XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • B(d);N_GUARD,P_SPINB(d)::QAB1(B),XB(d)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(C)::QAB1(B)
      • B(d);OGATE,SBLOCK,XS(C)::QAB1(B),XP(e)
      • P(a);OGATEB,XR(A)::QAR2(B)
      • P(a);OGATEB::QAR2(B),XP(a)
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