MESON Chess Problem Database

Problem Display
PID: 9713 (3Q4/K7/1R6/8/2n5/k7/p2R4/8 w - - 0 1)

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

St. Petersburger Zeitung, 1908

3Q4/K7/1R6/8/2n5/k7/p2R4/8

#2

4 + 3

3295 Einfuhrung in die Welt des Schachproblem 1984
3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991

SOLUTION

  • SOUND
  • Tries
    • 1.Qe7+?
      • 1...Ka4
        • 2.Qb4#
      • 1...Sd6!
    • 1.Qd6+?
      • 1...Ka4
        • 2.Qb4#
      • 1...Sxd6!
    • 1.Qf8+?
      • 1...Ka4
        • 2.Qb4#
      • 1...Sd6!
  • Keys
    • 1.Qd4!
      • 1...Ka4
        • 2.Rxa2#
      • 1...Sxd2
        • 2.Qb4#
      • 1...Sxb6
        • 2.Rd3#
      • 1...a1Q
        • 2.Qxa1#
      • 1...a1S
        • 2.Qxa1#
      • 1...a1B
        • 2.Qxa1#
      • 1...a1R
        • 2.Qxa1#
      • 1...Sb2
        • 2.Qb4#
      • 1...Se3
        • 2.Rd3#
        • 2.Qb4#
      • 1...Sa5
        • 2.Qb4#
      • 1...Se5
        • 2.Qb4#
      • 1...Sd6
        • 2.Rd3#
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • S(c);XQ(D)
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • Q(D);
    • Vars
      • K(b);P-FLIGHT,P_SPINS(c)::R(A),XP(a)
      • S(c);OGATE,XR(A)::QAB1(D)
      • S(c);XR(B)::R(A)
      • P(a);OGATEB::QAR2(D),XQ(a)
      • P(a);OGATEB::QAR2(D),XS(a)
      • P(a);OGATEB::QAR2(D),XB(a)
      • P(a);OGATEB::QAR2(D),XR(a)
      • S(c);OGATE::QAB1(D)
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