MESON Chess Problem Database

Problem Display
PID: 255202 (K2k4/1Q4N1/1p2p3/4N1q1/b4r2/8/8/4B3 w - - 0 1)

Stepanov, Aleksey V

Magadan-60 JT (Kudesnik), 1999

(First published on Tue Mar 9 1999)

K2k4/1Q4N1/1p2p3/4N1q1/b4r2/8/8/4B3

#2

5 + 6

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe7
      • 2.Qb8#
    • 1...Rb4
      • 2.Sf7#
    • 1...Rc4
      • 2.Sf7#
    • 1...Rd4
      • 2.Sf7#
    • 1...Re4
      • 2.Sf7#
    • 1...Rg4
      • 2.Sf7#
    • 1...Rh4
      • 2.Sf7#
    • 1...Rf7
      • 2.Sxf7#
    • 1...Bd1
      • 2.Sc6#
      • 2.Qd7#
    • 1...Bc2
      • 2.Sc6#
      • 2.Qd7#
    • 1...Bb3
      • 2.Sc6#
      • 2.Qd7#
    • 1...Bc6
      • 2.Sxc6#
    • 1...Bd7
      • 2.Qxd7#
    • 1...Be8
      • 2.Sxe6#
    • 1...b5
      • 2.Sc6#
      • 2.Ba5#
      • 2.Qd7#
  • Tries
    • 1.Qxb6+?
      • 1...Kc8
        • 2.Qb8#
      • 1...Ke7!
  • Keys
    • 1.Bb4!
      • threat
        • 2.Qb8#
      • 1...Qxe5
        • 2.Be7#
      • 1...Rxb4
        • 2.Sf7#
      • 1...Qg2
        • 2.Be7#
      • 1...Rc4
        • 2.Sf7#
      • 1...Bc6
        • 2.Sxc6#
      • 1...Bd7
        • 2.Qxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(c);SBLOCK::QAR2(C)
    • R(b);N_GUARD::S(B)
    • R(b);N_GUARD::S(B),XR(b)
    • B(a);N_GUARD,P_PINQ(C)::S(B),XB(a)
    • B(a);N_GUARD::QAR1(C),XB(a)
    • B(a);SBLOCK::S(D),XP(e)
  • Tries
    • Try
      • Q(C);CHECK,XP(d)
      • Vars
        • K(f);N_GUARD,P-FLIGHT::QAR1(C)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • B(A);
    • Threat
      • QAR2(C)
    • Vars
      • Q(c);N_GUARD,XS(B)::B(A)
      • R(b);N_GUARD,XB(A)::S(B)
      • Q(c);N_GUARD,P_PINQ(C)::B(A)
      • R(b);N_GUARD::S(B)
      • B(a);N_GUARD,P_PINQ(C)::S(B),XB(a)
      • B(a);N_GUARD::QAR1(C),XB(a)
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