MESON Chess Problem Database

Problem Display
PID: 63427 (8/3qp3/3pQ3/4p1K1/1R2P3/r3kPNp/2p2N2/2bbB2B w - - 0 1)

Chepizhni, Viktor Ivanovich

Rudenko, Valentin Fedorovich

1st Prize, Suomen Shakki, 1975

8/3qp3/3pQ3/4p1K1/1R2P3/r3kPNp/2p2N2/2bbB2B

#2

9 + 10

3771 FIDE Album (1974-1976) 1980
6167 Viktor Chepizhny 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qb3#
    • 1...Ra2
      • 2.Qb3#
    • 1...Rb3
      • 2.Qxb3#
    • 1...Rd3
      • 2.Sg4#
    • 1...Ra4
      • 2.Qb3#
    • 1...Ra5
      • 2.Qb3#
    • 1...Ra6
      • 2.Qb3#
    • 1...Ra7
      • 2.Qb3#
    • 1...Ra8
      • 2.Qb3#
    • 1...Be2
      • 2.Sf5#
  • Tries
    • 1.Kh4?
      • threat
        • 2.Qh6#
      • 1...Kf4
        • 2.Qh6#
      • 1...Qxe6!
    • 1.Qh6?
      • threat
        • 2.Kh4#
        • 2.Kh5#
        • 2.Kg6#
      • 1...Qg4+
        • 2.Kxg4#
      • 1...Qf5+
        • 2.Kxf5#
      • 1...Bxf3
        • 2.Kh4#
        • 2.Kg6#
      • 1...Qe8
        • 2.Kg4#
        • 2.Kh4#
        • 2.Kf5#
      • 1...Qe6!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Sf1#
      • 1...Qg4+
        • 2.Sxg4#
      • 1...Qf5+
        • 2.Sxf5#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Be2
        • 2.Qxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(d);N_GUARD::QAR(I)
    • R(d);N_GUARD::QAR(I),XR(d)
    • R(d);SBLOCK::S(C)
    • B(b);SBLOCK::S(E)
  • Tries
    • Try
      • K(H);S_FLIGHT
      • Threat
        • QAB(I)
      • Vars
        • K(e);S_FLIGHT::QAB(I)
      • Refutation
        • Q(i);XQ(I)
    • Try
      • Q(I);
      • Threat
        • DUALS(3)
      • Vars
        • Q(i);CHECK::QAB(I)+K(H),XQ(i)
      • Refutation
        • Q(i);
  • Actual
    • Q(I);
    • Threat
      • S(E)
    • Vars
      • Q(i);CHECK,N_GUARD::S(C),XQ(i)
      • Q(i);CHECK,N_GUARD::S(E),XQ(i)
      • R(d);N_GUARD::QAR1(I),XR(d)
      • B(b);N_GUARD::QAR1(I),XB(b)
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Developed and maintained by Brian Stephenson.
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