MESON Chess Problem Database

Problem Display
PID: 6061 (6B1/1p6/1p6/3R4/1k6/8/Q2K4/8 w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

Shakhmatny Listok, 1926

6B1/1p6/1p6/3R4/1k6/8/Q2K4/8

#2

4 + 3

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Tries
    • 1.Rd3?
      • 1...Kc5
        • 2.Qc4#
      • 1...b5
        • 2.Qa3#
      • 1...Kb5!
    • 1.Rd4+?
      • 1...Kc5
        • 2.Qc4#
        • 2.Qd5#
      • 1...Kb5!
    • 1.Ra5?
      • threat
        • 2.Qa3#
        • 2.Qa4#
      • 1...b5
        • 2.Qa3#
      • 1...bxa5!
    • 1.Qa1?
      • 1...Kb3
        • 2.Rd4#
        • 2.Rb5#
      • 1...Kc4
        • 2.Qc3#
        • 2.Qa4#
      • 1...b5!
    • 1.Qb2+?
      • 1...Kc4
        • 2.Ra5#
        • 2.Rb5#
        • 2.Re5#
        • 2.Rf5#
        • 2.Rg5#
        • 2.Rh5#
        • 2.Qc3#
        • 2.Qb5#
      • 1...Ka4!
    • 1.Qa3+?
      • 1...Kc4
        • 2.Qc3#
        • 2.Qa4#
      • 1...Kxa3!
    • 1.Qa5+?
      • 1...Kb3
        • 2.Rb5#
      • 1...Kc4
        • 2.Rd3#
        • 2.Rd6#
        • 2.Rd7#
        • 2.Rd8#
        • 2.Qc3#
        • 2.Qa4#
        • 2.Qb5#
      • 1...bxa5!
    • 1.Qa6?
      • threat
        • 2.Rb5#
      • 1...Kb3
        • 2.Rb5#
      • 1...b5
        • 2.Rxb5#
      • 1...bxa6!
    • 1.Qa8?
      • 1...Kb3
        • 2.Rb5#
      • 1...Kc4
        • 2.Qa4#
      • 1...b5!
  • Keys
    • 1.Qa7!
      • 1...Kb3
        • 2.Rb5#
      • 1...Kc4
        • 2.Qa4#
      • 1...b5
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAB1(A)
      • Refutation
        • P(b);XR(C)
    • Try
      • Q(A);
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::B(D)+R(C),DCHECK
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • R1(C)
      • Vars
        • K(a);P-FLIGHT::B(D)+R(C),DCHECK
        • P(b);::R1(C),XP(b)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::B(D)+R(C),DCHECK
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::B(D)+R(C),DCHECK
      • K(a);P-FLIGHT::QAR2(A)
      • P(b);SBLOCK::R(C)
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