MESON Chess Problem Database

Problem Display
PID: 119878 (5K2/8/8/5p2/PQ5p/R4qkP/R7/7r w - - 0 1)

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

Deutsche Schachzeitung, 1909

5K2/8/8/5p2/PQ5p/R4qkP/R7/7r

#2

6 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh3
      • 2.Rxf3#
    • 1...Qb3
      • 2.Rxb3#
    • 1...Qc3
      • 2.Rxc3#
    • 1...Qd3
      • 2.Rxd3#
    • 1...Qe3
      • 2.Rxe3#
  • Tries
    • 1.Qf4+?
      • 1...Kxh3
        • 2.Rxf3#
        • 2.Qxf3#
      • 1...Kxf4!
  • Keys
    • 1.Qd2!
      • 1...Qxa3+
        • 2.Rxa3#
      • 1...Kxh3
        • 2.Qg2#
      • 1...Rxh3
        • 2.Qg5#
      • 1...Qb3
        • 2.Rxb3#
      • 1...Qc3
        • 2.Rxc3#
      • 1...Qd3
        • 2.Rxd3#
      • 1...Qe3
        • 2.Qxe3#
      • 1...Ra1
        • 2.Qh2#
      • 1...Rb1
        • 2.Qh2#
      • 1...Rc1
        • 2.Qh2#
      • 1...Rd1
        • 2.Qh2#
      • 1...Re1
        • 2.Qh2#
      • 1...Rf1
        • 2.Qh2#
      • 1...Rg1
        • 2.Qh2#
      • 1...Rh2
        • 2.Qxh2#
      • 1...f4
        • 2.Qg2#

There are these versions: 187650

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,XP(C)::R(B),XQ(b)
    • Q(b);OGATEB::R(B),XQ(b)
  • Tries
    • Try
      • Q(E);CHECK
      • Refutation
        • K(c);N_SPINQ(b),S_FLIGHT,XQ(E)
  • Actual
    • Q(E);
    • Vars
      • Q(b);CHECK,N_SPINQ(b),OGATE,XR(B)::R(A),XQ(b)
      • K(c);P-FLIGHT,XP(C)::QAB1(E)
      • R(a);SBLOCK,XP(C)::QAR2(E)
      • Q(b);OGATEB::R(B),XQ(b)
      • Q(b);OGATEB::QAR2(E),XQ(b)
      • R(a);N_GUARD::QAB1(E)
      • R(a);N_GUARD::QAB1(E),XR(a)
      • P(e);SBLOCK::QAR1(E)
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