MESON Chess Problem Database

Problem Display
PID: 117120 (8/8/3Q1P1K/8/1n5N/3rP1Pk/q6p/3B1n1N w - - 0 1)

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

Shakhmaty, 1925

8/8/3Q1P1K/8/1n5N/3rP1Pk/q6p/3B1n1N

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Sf2#
      • 2.Qe6#
    • 1...Qb3
      • 2.Sf2#
    • 1...Qc4
      • 2.Sf2#
    • 1...Qd5
      • 2.Sf2#
    • 1...Qe6
      • 2.Sf2#
      • 2.Qxe6#
    • 1...Qf7
      • 2.Sf2#
    • 1...Qg8
      • 2.Sf2#
    • 1...Qa1
      • 2.Sf2#
      • 2.Qe6#
    • 1...Qb2
      • 2.Qe6#
    • 1...Qc2
      • 2.Qe6#
    • 1...Qd2
      • 2.Qe6#
    • 1...Qf2
      • 2.Sxf2#
    • 1...Qg2
      • 2.Qe6#
    • 1...Qa3
      • 2.Sf2#
      • 2.Qe6#
    • 1...Qa4
      • 2.Sf2#
      • 2.Qe6#
    • 1...Qa5
      • 2.Sf2#
    • 1...Qa6
      • 2.Sf2#
    • 1...Qa7
      • 2.Sf2#
      • 2.Qe6#
    • 1...Qa8
      • 2.Sf2#
      • 2.Qe6#
    • 1...Rb3
      • 2.Qe6#
      • 2.Qd7#
    • 1...Sd2
      • 2.Sf2#
    • 1...Sxg3
      • 2.Qxg3#
    • 1...Sc2
      • 2.Sf2#
    • 1...Sd5
      • 2.Qe6#
      • 2.Qd7#
  • Tries
    • 1.Qd7+?
      • 1...Qe6
        • 2.Qxe6#
      • 1...Rxd7!
  • Keys
    • 1.Bc2!
      • threat
        • 2.Sf2#
      • 1...Kg4
        • 2.Sf2#
      • 1...Qxc2
        • 2.Qe6#
      • 1...Rxd6
        • 2.Bf5#
      • 1...Sxg3
        • 2.Qxg3#
      • 1...Rd2
        • 2.Bf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 13
  • Sets
    • Q(b);N_GUARD::S(B)
    • Q(b);N_GUARD::QAB(F)
    • Q(b);N_GUARD,P_PINP(C)::QAB(F)
    • Q(b);N_GUARD::S(B),XQ(b)
    • Q(b);N_GUARD,SBLOCK::S(B)
    • S(a);S_CUTQ(b)::S(B)
    • S(a);OGATE,XP(D)::QAR1(F),XS(a)
    • S(f);S_CUTQ(b)::S(B)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • Q(b);N_GUARD,P_PINP(G),P_SPINQ(b)::QAB(F),XQ(b)
      • Refutation
        • R(d);XQ(F)
  • Actual
    • B(A);
    • Threat
      • S(B)
    • Vars
      • K(e);S_FLIGHT::S(B)
      • Q(b);N_GUARD,XB(A)::QAB(F)
      • R(d);OGATE,P_PINP(G),XQ(F)::B(A)
      • S(a);OGATE,XP(D)::QAR1(F),XS(a)
      • R(d);OGATE::B(A)
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