MESON Chess Problem Database

Problem Display
PID: 184781 (8/B7/5N2/2P3K1/3k1P2/2b5/2R1P3/2Qn4 w - - 0 1)

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

Deutsche Schachzeitung, 1908

8/B7/5N2/2P3K1/3k1P2/2b5/2R1P3/2Qn4

#2

8 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Rc4#
      • 2.Qd2#
      • 2.c6#
    • 1...Be1
      • 2.Rc4#
      • 2.c6#
    • 1...Bb2
      • 2.Rc4#
      • 2.Qd2#
      • 2.c6#
    • 1...Bd2
      • 2.Qxd2#
      • 2.c6#
    • 1...Bb4
      • 2.Rc4#
    • 1...Ba5
      • 2.Rc4#
  • Tries
    • 1.Rxc3?
      • threat
        • 2.Rd3#
        • 2.Rc4#
        • 2.Qd2#
        • 2.c6#
      • 1...Sb2
        • 2.Qe3#
        • 2.e3#
        • 2.c6#
      • 1...Sf2
        • 2.Rc4#
        • 2.Qe3#
        • 2.e3#
        • 2.c6#
      • 1...Se3
        • 2.Rd3#
        • 2.Qd2#
        • 2.Qxe3#
        • 2.c6#
      • 1...Sxc3!
    • 1.Qd2+?
      • 1...Bxd2
        • 2.c6#
      • 1...Kc4!
    • 1.Qxd1+?
      • 1...Ke3
        • 2.Qg1#
      • 1...Bd2
        • 2.Qxd2#
        • 2.c6#
      • 1...Kc4!
  • Keys
    • 1.Qa3!
      • 1...Ke3
        • 2.c6#
      • 1...Kc4
        • 2.Qa4#
      • 1...Sb2
        • 2.Qxc3#
      • 1...Ba1
        • 2.Qd3#
        • 2.c6#
      • 1...Be1
        • 2.Qd3#
        • 2.c6#
      • 1...Bb2
        • 2.Qd3#
        • 2.c6#
      • 1...Bd2
        • 2.Qd3#
        • 2.c6#
      • 1...Bb4
        • 2.Qd3#
      • 1...Ba5
        • 2.Qd3#
      • 1...Sf2
        • 2.Qxc3#
      • 1...Se3
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(b);OGATE::R1(B)
  • Tries
    • Try
      • R(B);XB(b)
      • Threat
        • DUALS(4)
      • Refutation
        • S(a);XR(B)
    • Try
      • Q(A);CHECK
      • Vars
        • B(b);P_PINP(D),XQ(A)::B(H)+P(E)
      • Refutation
        • K(c);P-FLIGHT,P_SPINB(b)
    • Try
      • Q(A);CHECK,XS(a)
      • Vars
        • K(c);S_FLIGHT::QAB(A)
      • Refutation
        • K(c);P-FLIGHT,P_SPINB(b)
  • Actual
    • Q(A);
    • Vars
      • K(c);P_SPINB(b),S_FLIGHT::B(H)+P(E)
      • K(c);P-FLIGHT,P_SPINB(b)::QAR2(A)
      • S(a);N_GUARD::QAB1(A),XB(b)
      • B(b);OGATE::QAR1(A)
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