MESON Chess Problem Database

Problem Display
PID: 138474 (3b3Q/3K4/4N3/3kP3/1Rp1p1R1/n7/3P4/8 w - - 0 1)

Chepizhni, Viktor Ivanovich

Comm., Sportowiec, 1959

3b3Q/3K4/4N3/3kP3/1Rp1p1R1/n7/3P4/8

#2

7 + 5

6167 Viktor Chepizhny 2007
3713 Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Rb5#
    • 1...Sc2
      • 2.Rb5#
    • 1...Sb5
      • 2.Rxb5#
    • 1...c3
      • 2.Rd4#
    • 1...e3
      • 2.Rd4#
  • Tries
    • 1.Rg5?
      • 1...e3
        • 2.Qh1#
      • 1...Ba5
        • 2.Qa8#
      • 1...Bb6
        • 2.Qa8#
      • 1...Bf6
        • 2.Qa8#
        • 2.exf6#
      • 1...Bc7
        • 2.Qa8#
      • 1...Be7
        • 2.Qa8#
      • 1...Sb1
        • 2.Rb5#
      • 1...Sc2
        • 2.Rb5#
      • 1...Sb5
        • 2.Rxb5#
      • 1...c3
        • 2.Rd4#
      • 1...Bxg5!
    • 1.Qh7?
      • threat
        • 2.Qxe4#
      • 1...e3
        • 2.Qe4#
      • 1...Kxe5!
    • 1.d3?
      • threat
        • 2.dxe4#
      • 1...cxd3
        • 2.Rd4#
      • 1...exd3
        • 2.Rd4#
      • 1...e3
        • 2.Rd4#
      • 1...Bf6!
  • Keys
    • 1.d4!
      • 1...cxd4 ep
        • 2.Rd4#
      • 1...exd4 ep
        • 2.Rd4#
      • 1...Bh4
        • 2.Qa8#
      • 1...Ba5
        • 2.Qa8#
      • 1...Bg5
        • 2.Qa8#
      • 1...Bb6
        • 2.Qa8#
      • 1...Bf6
        • 2.Qa8#
      • 1...Bc7
        • 2.Qa8#
      • 1...Be7
        • 2.Qa8#
      • 1...Sb1
        • 2.Rb5#
      • 1...Sc2
        • 2.Rb5#
      • 1...Sb5
        • 2.Rxb5#
      • 1...c3
        • 2.Sf4#
      • 1...e3
        • 2.Qh1#

This anticipates 15705(1987-1988)

This is a version

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::R(B)
    • S(a);N_GUARD::R(B),XS(a)
    • P(b);OGATE::R1(B)
    • P(c);OGATE::R1(C)
  • Tries
    • Try
      • R(C);
      • Vars
        • P(c);OGATEB::QAB(G)
        • B(e);OGATE::QAB(G)
        • S(a);N_GUARD::R(B)
        • S(a);N_GUARD::R(B),XS(a)
        • P(b);OGATE::R1(B)
      • Refutation
        • B(e);XR(C)
    • Try
      • Q(G);
      • Threat
        • QAB1(G),XP(c)
      • Vars
        • P(c);::QAB1(G)
      • Refutation
        • K(d);P-FLIGHT,XP(D)
    • Try
      • P(A);
      • Threat
        • P(A),XP(c)
      • Vars
        • P(b);OGATE,XP(A)::R1(B)
        • P(c);OGATE,XP(A)::R1(C)
        • P(c);OGATE::R1(C)
      • Refutation
        • B(e);
  • Actual
    • P(A);
    • Vars
      • P(b);EP,OGATE,XP(A)::R1(B)
      • P(c);EP,OGATE,XP(A)::R1(C)
      • B(e);OGATE::QAB(G)
      • S(a);N_GUARD::R(B)
      • S(a);N_GUARD::R(B),XS(a)
      • P(b);::S(E)
      • P(c);OGATEB::QAB(G)
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