MESON Chess Problem Database

Problem Display
PID: 224547 (B6K/5pR1/1Npp4/4kP2/3p2P1/1Qp4R/6N1/B7 w - - 0 1)

Anonymous

English Mechanic and World of Science, 1887

(First published on Fri Oct 7 1887)

B6K/5pR1/1Npp4/4kP2/3p2P1/1Qp4R/6N1/B7

#2

10 + 6

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Sd7#
    • 1...f6
      • 2.Re7#
      • 2.Qe6#
  • Tries
    • 1.Re3+?
      • 1...Kf6
        • 2.Sd7#
        • 2.Qxf7#
      • 1...dxe3!
    • 1.Qd5+?
      • 1...Kf6
        • 2.Qxd6#
      • 1...cxd5!
    • 1.Qxf7?
      • threat
        • 2.Qe6#
        • 2.Qe7#
      • 1...Ke4
        • 2.Qe6#
        • 2.Qe8#
        • 2.Qe7#
      • 1...d3!
  • Keys
    • 1.Qb4!
      • 1...Ke4
        • 2.Re3#
      • 1...Kf6
        • 2.Qxd6#
      • 1...c2
        • 2.Qxd4#
      • 1...d3
        • 2.Bxc3#
      • 1...c5
        • 2.Sd7#
      • 1...d5
        • 2.Qe7#
      • 1...f6
        • 2.Re7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • P(d);::S(G)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • P(b);P_SPINP(a),XR(D)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR2(C),XP(e)
      • Refutation
        • P(d);XQ(C)
    • Try
      • Q(C);XP(f)
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);P_SPINP(a)
  • Actual
    • Q(C);
    • Vars
      • K(c);P-FLIGHT,P_SPINP(b)::R1(D)
      • K(c);S_FLIGHT::QAR2(C),XP(e)
      • P(a);P_SPINP(b)::QAB1(C),XP(b)
      • P(b);OGATEB,P_SPINP(a)::B(A),XP(a)
      • P(d);::S(G)
      • P(e);OGATE::QAR2(C)
      • P(f);OGATE,SBLOCK::R(H)
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