MESON Chess Problem Database

Problem Display
PID: 167314 (R2K2k1/P4q2/4B2Q/8/8/8/8/8 w - - 0 1)

Kratschmer, Ralf

Der Tagesspiegel (Berlin), 1988

R2K2k1/P4q2/4B2Q/8/8/8/8/8

#2

5 + 2

5454 Near Snap 2018
15148 Sadier Collection 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Bb3?
      • 1...Qd5+
        • 2.Ke7#
        • 2.Bxd5#
      • 1...Qc4
        • 2.Ke7#
        • 2.Bxc4#
      • 1...Qe6
        • 2.Bxe6#
      • 1...Qxb3!
    • 1.Bc4?
      • 1...Qd5+
        • 2.Ke7#
        • 2.Bxd5#
      • 1...Qe6
        • 2.Bxe6#
      • 1...Qxc4!
    • 1.Bd5?
      • 1...Qe6
        • 2.Bxe6#
      • 1...Qxd5+!
    • 1.Qg6+?
      • 1...Kf8
        • 2.Qxf7#
      • 1...Kh8!
    • 1.Qh7+?
      • 1...Kf8
        • 2.Qxf7#
      • 1...Kxh7!
  • Keys
    • 1.Ba2!
      • 1...Qd5+
        • 2.Ke7#
        • 2.Bxd5#
      • 1...Qxa2
        • 2.Ke7#
      • 1...Qb3
        • 2.Ke7#
        • 2.Bxb3#
      • 1...Qc4
        • 2.Ke7#
        • 2.Bxc4#
      • 1...Qe6
        • 2.Bxe6#

Anticipated by 170489(1973)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(A);
      • Vars
        • Q(a);OGATEB::B(A),XQ(a)
      • Refutation
        • Q(a);N_SPINQ(a),XB(A)
    • Try
      • B(A);
      • Vars
        • Q(a);OGATEB::B(A),XQ(a)
      • Refutation
        • Q(a);N_SPINQ(a),XB(A)
    • Try
      • B(A);
      • Vars
        • Q(a);OGATEB::B(A),XQ(a)
      • Refutation
        • Q(a);CHECK,N_SPINQ(a),XB(A)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);N_SPINQ(a),P-FLIGHT::QAR1(B),XQ(a)
      • Refutation
        • K(b);N_SPINQ(a),P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);N_SPINQ(a),P-FLIGHT::QAR1(B),XQ(a)
      • Refutation
        • K(b);N_SPINQ(a),S_FLIGHT,XQ(B)
  • Actual
    • B(A);
    • Vars
      • Q(a);N_SPINQ(a),XB(A)::R(D)+K(E)
      • Q(a);OGATEB::B(A),XQ(a)
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