MESON Chess Problem Database

Problem Display
PID: 40666 (R7/2p1NQ1K/R7/1kp5/1p6/3nB3/P1N5/1n2b3 w - - 0 1)

Chepizhni, Viktor Ivanovich

1st Prize=, Moscow Ty., 2000

R7/2p1NQ1K/R7/1kp5/1p6/3nB3/P1N5/1n2b3

#2

8 + 7

56 The Problemist 2001
56 The Problemist 2002
145 StrateGems 2003
23 Die Schwalbe 2004
6004 Henk Hagedoorn Solving Ty. 2007
6167 Viktor Chepizhny 2007

SOLUTION

  • SOUND
  • Sets
    • 1...b3
      • 2.a4#
    • 1...c4
      • 2.Ra5#
  • Tries
    • 1.Bxc5?
      • threat
        • 2.Ra5#
      • 1...Kxc5
        • 2.Qd5#
      • 1...Sxc5
        • 2.Sd4#
      • 1...b3!
    • 1.Qb3?
      • threat
        • 2.a4#
      • 1...Sa3
        • 2.Sxa3#
      • 1...Sc3
        • 2.Sa3#
      • 1...Sb2!
    • 1.Qd5?
      • threat
        • 2.Sd4#
      • 1...b3
        • 2.a4#
      • 1...Bc3!
    • 1.Qe6?
      • threat
        • 2.Ra5#
        • 2.Rb8#
      • 1...b3
        • 2.Rb8#
        • 2.a4#
      • 1...c6!
  • Keys
    • 1.Sxb4!
      • threat
        • 2.Rb8#
      • 1...Kxb4
        • 2.Qb3#
      • 1...Bxb4
        • 2.a4#
      • 1...Sxb4
        • 2.a4#
      • 1...cxb4
        • 2.Ra5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • P(d);N_GUARD::P(A)
    • P(f);::R1(D)
  • Tries
    • Try
      • B(C);XP(f)
      • Threat
        • R1(D)
      • Vars
        • K(e);OGATEB,P-FLIGHT,XB(C)::QAR1(F)
        • S(c);SBLOCK,XB(C)::S(B)
      • Refutation
        • P(d);
    • Try
      • Q(F);P_PINP(d)
      • Threat
        • P(A)
      • Vars
        • S(a);N_GUARD::S(B),XS(a)
        • S(a);N_GUARD::S(B)
      • Refutation
        • S(c);
    • Try
      • Q(F);P_PINP(f)
      • Threat
        • S(B)
      • Vars
        • P(d);N_GUARD::P(A)
      • Refutation
        • B(b);
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Refutation
        • P(g);
  • Actual
    • S(B);XP(d)
    • Threat
      • R(H)
    • Vars
      • K(e);OGATEB,P-FLIGHT,XS(B)::QAR1(F)
      • B(b);SBLOCK,XS(B)::P(A)
      • S(c);SBLOCK,XS(B)::P(A)
      • P(f);SBLOCK,XS(B)::R1(D)
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