MESON Chess Problem Database

Problem Display
PID: 258274 (1Q6/7K/8/2pp1p2/2Pk1P2/n6R/b4N2/8 w - - 0 1)

Anonymous

English Mechanic and World of Science, 1890

(First published on Fri Dec 26 1890)

1Q6/7K/8/2pp1p2/2Pk1P2/n6R/b4N2/8

#2

6 + 6

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc4
      • 2.Qe5#
      • 2.Qb2#
      • 2.Qh8#
    • 1...Sxc4
      • 2.Rd3#
    • 1...dxc4
      • 2.Qe5#
      • 2.Qd6#
      • 2.Qd8#
  • Tries
    • 1.Rc3?
      • threat
        • 2.Qe5#
        • 2.Qh8#
      • 1...Sxc4
        • 2.Rd3#
      • 1...dxc4
        • 2.Qe5#
      • 1...Kxc3!
    • 1.Qd6?
      • threat
        • 2.Qxd5#
      • 1...Bxc4
        • 2.Qe5#
        • 2.Qf6#
      • 1...Sxc4
        • 2.Rd3#
      • 1...Kxc4!
    • 1.Qb3?
      • threat
        • 2.Rd3#
        • 2.Qc3#
        • 2.Qd3#
      • 1...dxc4
        • 2.Qd1#
      • 1...Bb1
        • 2.Qc3#
      • 1...Sb1
        • 2.Rd3#
        • 2.Qd3#
      • 1...Sb5
        • 2.Rd3#
        • 2.Qd3#
      • 1...Bxb3!
    • 1.Qb4?
      • threat
        • 2.Rd3#
        • 2.Qc3#
      • 1...dxc4
        • 2.Rd3#
        • 2.Qd2#
      • 1...Bb1
        • 2.Qc3#
      • 1...Sb1
        • 2.Rd3#
      • 1...Sb5
        • 2.Rd3#
      • 1...cxb4!
    • 1.Qb7?
      • threat
        • 2.Qxd5#
      • 1...Bxc4
        • 2.Qb2#
        • 2.Qg7#
      • 1...Sxc4
        • 2.Rd3#
      • 1...dxc4
        • 2.Qd7#
      • 1...Kxc4!
    • 1.Qd8?
      • threat
        • 2.Qxd5#
      • 1...Bxc4
        • 2.Qf6#
        • 2.Qh8#
      • 1...Sxc4
        • 2.Rd3#
      • 1...Kxc4!
    • 1.Qg8?
      • threat
        • 2.Qxd5#
      • 1...Bxc4
        • 2.Qg7#
        • 2.Qh8#
      • 1...Sxc4
        • 2.Rd3#
      • 1...dxc4
        • 2.Qd8#
      • 1...Kxc4!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qxd5#
      • 1...Kxc4
        • 2.Qa4#
      • 1...Bxc4
        • 2.Qh8#
      • 1...Sxc4
        • 2.Rd3#
      • 1...dxc4
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(b);SBLOCK,XP(C)::R1(B)
  • Tries
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);SBLOCK,XP(C)::R1(B)
        • P(e);XP(C)::QAB1(F)
      • Refutation
        • K(c);S_FLIGHT,XR(B)
    • Try
      • Q(F);P_PINP(e)
      • Threat
        • QAR1(F),XP(e)
      • Vars
        • S(b);SBLOCK,XP(C)::R1(B)
      • Refutation
        • K(c);N_SPINP(e),P-FLIGHT,XP(C)
    • Try
      • Q(F);
      • Threat
        • DUALS(3)
      • Vars
        • P(e);SBLOCK,XP(C)::QAR(F)
        • B(a);::QAB1(F)
      • Refutation
        • B(a);XQ(F)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB1(F)
        • S(b);::R1(B)
      • Refutation
        • P(d);XQ(F)
    • Try
      • Q(F);
      • Threat
        • QAR1(F),XP(e)
      • Vars
        • S(b);SBLOCK,XP(C)::R1(B)
        • P(e);OGATEB,SBLOCK,XP(C)::QAR(F)
      • Refutation
        • K(c);P-FLIGHT,XP(C)
    • Try
      • Q(F);P_PINP(e)
      • Threat
        • QAR1(F),XP(e)
      • Vars
        • S(b);SBLOCK,XP(C)::R1(B)
      • Refutation
        • K(c);N_SPINP(e),P-FLIGHT,XP(C)
    • Try
      • Q(F);
      • Threat
        • QAR1(F),XP(e)
      • Vars
        • S(b);SBLOCK,XP(C)::R1(B)
        • P(e);OGATEB,SBLOCK,XP(C)::QAR(F)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(e),XP(C)
  • Actual
    • Q(F);
    • Threat
      • QAR1(F),XP(e)
    • Vars
      • K(c);OGATEB,P-FLIGHT,XP(C)::QAR2(F)
      • B(a);SBLOCK,XP(C)::QAB(F)
      • S(b);SBLOCK,XP(C)::R1(B)
      • P(e);OGATEB,SBLOCK,XP(C)::QAR(F)
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