MESON Chess Problem Database

Problem Display
PID: 225582 (5B2/5p2/2PKpp2/1R6/8/kq5R/1p6/nQ1B4 w - - 0 1)

Lazdinits, Eriks

Comm., Praca, 1958

5B2/5p2/2PKpp2/1R6/8/kq5R/1p6/nQ1B4

#2

7 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Kc7#
      • 2.Kd7#
      • 2.Qxb2#
    • 1...Qd3+
      • 2.Kc7#
    • 1...Qe3
      • 2.Kc7#
      • 2.Kd7#
      • 2.Qxb2#
    • 1...Qf3
      • 2.Kc7#
      • 2.Kd7#
      • 2.Qxb2#
    • 1...Qg3+
      • 2.Kd7#
    • 1...Qxh3
      • 2.Kc7#
      • 2.Kd7#
      • 2.Qxb2#
  • Tries
    • 1.Bxb3?
      • threat
        • 2.Kc7#
        • 2.Kd7#
        • 2.Qa2#
      • 1...Sc2
        • 2.Bxc2#
        • 2.Qa2#
      • 1...Sxb3!
    • 1.Rhxb3+?
      • 1...Ka4
        • 2.Qa2#
        • 2.Qe4#
      • 1...Sxb3!
    • 1.Rbxb3+?
      • 1...Ka4
        • 2.Qa2#
      • 1...Sxb3!
  • Keys
    • 1.Kc5!
      • threat
        • 2.Ra5#
      • 1...Qc3+
        • 2.Kb6#
      • 1...Qe3+
        • 2.Kc4#
      • 1...Ka4
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(d);CHECK::B(G)+K(F)
  • Tries
    • Try
      • B(B);XQ(d)
      • Threat
        • DUALS(3)
      • Refutation
        • S(a);P_SPINS(a),XB(B)
    • Try
      • R(C);CHECK,XQ(d)
      • Refutation
        • S(a);XR(C)
    • Try
      • R(D);CHECK,XQ(d)
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • S(a);P_SPINS(a),XR(D)
  • Actual
    • K(F);S_FLIGHT
    • Threat
      • R(D)
    • Vars
      • Q(d);CHECK::B(G)+K(F)
      • K(c);P-FLIGHT::QAR2(A)
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Developed and maintained by Brian Stephenson.
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