MESON Chess Problem Database

Problem Display
PID: 9654 (8/8/8/2Kn4/8/8/n2B1Q2/rB1k2r1 w - - 0 1)

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

Sovremenoe slovo, 1907

8/8/8/2Kn4/8/8/n2B1Q2/rB1k2r1

#2

4 + 5

3310 2345 Chess Problems 1997
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qxe1#
    • 1...Rg2
      • 2.Qe1#
    • 1...Rg3
      • 2.Qe1#
    • 1...Rg4
      • 2.Qe1#
    • 1...Rg5
      • 2.Qe1#
    • 1...Rg6
      • 2.Qe1#
    • 1...Rg7
      • 2.Qe1#
    • 1...Rg8
      • 2.Qe1#
  • Tries
    • 1.Be1?
      • threat
        • 2.Qd2#
      • 1...Kc1
        • 2.Qc2#
      • 1...Rxe1
        • 2.Qc2#
      • 1...Rg2!
    • 1.Be3?
      • threat
        • 2.Bc2#
        • 2.Qd2#
      • 1...Rxb1
        • 2.Qd2#
      • 1...Rg2
        • 2.Bc2#
        • 2.Qf1#
      • 1...Sab4
        • 2.Qd2#
      • 1...Sdb4
        • 2.Qd2#
      • 1...Sxe3!
  • Keys
    • 1.Bc1!
      • threat
        • 2.Qd2#
      • 1...Kxc1
        • 2.Qc2#
      • 1...Sxc1
        • 2.Bc2#
      • 1...Rg2
        • 2.Qf1#

This anticipates 120672(1945)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(c);N_GUARD::QAR1(C),XR(c)
    • R(c);N_GUARD::QAR1(C)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR1(C)
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
        • R(c);SBLOCK,XB(B)::QAB1(C)
      • Refutation
        • R(c);
    • Try
      • B(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XB(A)::QAR1(C)
        • S(d);::QAR1(C)
        • S(e);::QAR1(C)
      • Refutation
        • S(e);XB(B)
  • Actual
    • B(B);
    • Threat
      • QAR1(C)
    • Vars
      • K(b);P-FLIGHT,XB(B)::QAR1(C)
      • S(d);SBLOCK,XB(B)::B(A)
      • R(c);N_GUARD::QAR2(C)
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