MESON Chess Problem Database

Problem Display
PID: 119818 (2K5/NN2Q3/8/3P4/kPb3p1/p5P1/B7/8 w - - 0 1)

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

Deutsche Schachzeitung, 1909

2K5/NN2Q3/8/3P4/kPb3p1/p5P1/B7/8

#2

8 + 4

6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qc5?
      • threat
        • 2.Qa5#
      • 1...Bb5
        • 2.Qxb5#
      • 1...Bxa2!
    • 1.Qd8?
      • threat
        • 2.Qa5#
      • 1...Kxb4
        • 2.Qa5#
      • 1...Bxa2!
    • 1.Qc7?
      • threat
        • 2.Qa5#
      • 1...Kxb4
        • 2.Qa5#
        • 2.Qxc4#
      • 1...Bxa2!
    • 1.Qd7+?
      • 1...Bb5
        • 2.Qxb5#
      • 1...Kxb4!
    • 1.Qe8+?
      • 1...Bb5
        • 2.Qxb5#
      • 1...Kxb4!
  • Keys
    • 1.Qe4!
      • 1...Kxb4
        • 2.Qxc4#
      • 1...Bxa2
        • 2.Sc5#
      • 1...Bxd5
        • 2.Sc5#
      • 1...Bf1
        • 2.Sc5#
      • 1...Be2
        • 2.Sc5#
      • 1...Bb3
        • 2.Sc5#
      • 1...Bd3
        • 2.Sc5#
      • 1...Bb5
        • 2.Sc5#
      • 1...Ba6
        • 2.b5#

This anticipates 164683(2007)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • B(c);N_GUARD::QAB1(G),XB(c)
      • Refutation
        • B(c);XB(A)
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • K(b);P-FLIGHT,XP(C)::QAB1(G)
      • Refutation
        • B(c);XB(A)
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Refutation
        • B(c);XB(A)
    • Try
      • Q(G);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAB1(G),XB(c)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
    • Try
      • Q(G);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAB1(G),XB(c)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
  • Actual
    • Q(G);
    • Vars
      • K(b);OGATEB,P-FLIGHT,P_SPINB(c),XP(C)::QAR1(G),XB(c)
      • B(c);XB(A)::S(F)
      • B(c);XP(D)::S(F)
      • B(c);::S(F)
      • B(c);P_PINS(F)::QAR(G)+P(C)
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