MESON Chess Problem Database

Problem Display
PID: 220390 (8/8/8/1K1p4/1N1R1p2/5p2/1k3N2/4Q3 w - - 0 1)

Meyer, Heinrich Friedrich Ludwig

Leeds Mercury Weekly Supplement, 1881

(First published on Sat Mar 26 1881)

8/8/8/1K1p4/1N1R1p2/5p2/1k3N2/4Q3

#2

5 + 4

15239 Valois Notebooks 2020
5454 Near Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Ka3
      • 2.Qc3#
  • Tries
    • 1.Ka5?
      • 1...Ka3
        • 2.Qc3#
      • 1...Kb3!
    • 1.Sfd3+?
      • 1...Ka3
        • 2.Qc3#
      • 1...Kb3!
    • 1.Rxd5?
      • 1...Ka3
        • 2.Qc3#
      • 1...Kb3!
    • 1.Qd2+?
      • 1...Ka1
        • 2.Qc1#
        • 2.Qa2#
      • 1...Ka3
        • 2.Rd3#
        • 2.Qc3#
        • 2.Qa2#
      • 1...Kb3
        • 2.Rd3#
      • 1...Kb1!
    • 1.Qc3+?
      • 1...Kb1
        • 2.Rd1#
      • 1...Kxc3!
    • 1.Qa1+?
      • 1...Kb3
        • 2.Rd3#
      • 1...Kxa1!
    • 1.Qb1+?
      • 1...Ka3
        • 2.Sc2#
        • 2.Rd3#
        • 2.Qa2#
      • 1...Kc3
        • 2.Rd3#
      • 1...Kxb1!
    • 1.Qc1+?
      • 1...Kb3
        • 2.Rd3#
      • 1...Kxc1!
    • 1.Qe2+?
      • 1...Ka1
        • 2.Rd1#
        • 2.Qa2#
      • 1...Kb1
        • 2.Rd1#
      • 1...Kc1
        • 2.Rd1#
        • 2.Qc2#
      • 1...Ka3
        • 2.Rd3#
        • 2.Qa2#
      • 1...Kb3
        • 2.Rd3#
      • 1...Kc3
        • 2.Rd3#
      • 1...fxe2!
  • Keys
    • 1.Qe5!
      • 1...Ka1
        • 2.Rd1#
      • 1...Kb1
        • 2.Rd1#
      • 1...Kc1
        • 2.Rd1#
      • 1...Ka3
        • 2.Rd3#
      • 1...Kb3
        • 2.Rd3#
      • 1...Kc3
        • 2.Rd3#

This anticipates 22515(1881)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR2(A)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);XP(d)
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R(D)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R(D)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(D)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R(D)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R(D)
        • K(a);S_FLIGHT::R1(D)
      • Refutation
        • P(b);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAB(A)+R(D),DCHECK
      • K(a);P-FLIGHT::R(D)
      • K(a);S_FLIGHT::R1(D)
      • K(a);S_FLIGHT::R(D)
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