MESON Chess Problem Database

Problem Display
PID: 141832 (7b/2R1p3/BK3Qp1/4n1Rn/3kP3/1p4N1/1qpr4/5N2 w - - 0 1)

Chepizhni, Viktor Ivanovich

Rudenko, Valentin Fedorovich

3rd HM., Stella Polaris, 1972

7b/2R1p3/BK3Qp1/4n1Rn/3kP3/1p4N1/1qpr4/5N2

#2

8 + 10

6167 Viktor Chepizhny 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Rd7#
    • 1...Rd1
      • 2.Qf2#
    • 1...Rf2
      • 2.Qxf2#
    • 1...Rd3
      • 2.Rc4#
    • 1...Sg7
      • 2.Qxe5#
  • Tries
    • 1.Qc6?
      • threat
        • 2.Qd5#
        • 2.Qc5#
      • 1...Sc4+
        • 2.Qxc4#
      • 1...Sd7+
        • 2.Rxd7#
        • 2.Qxd7#
      • 1...Sxg3
        • 2.Qd5#
      • 1...c1Q
        • 2.Qd5#
      • 1...c1R
        • 2.Qd5#
      • 1...Qa3
        • 2.Qd5#
        • 2.Qc3#
      • 1...Qc3
        • 2.Qd5#
        • 2.Qxc3#
      • 1...Sd3
        • 2.Rd5#
        • 2.Rd7#
        • 2.Qd5#
        • 2.Qd7#
        • 2.Qc4#
      • 1...Sf4
        • 2.Qc5#
      • 1...Sf6
        • 2.Qc5#
      • 1...e6
        • 2.Qc5#
        • 2.Qd6#
      • 1...Sxc6!
    • 1.Qe6?
      • threat
        • 2.Qd5#
      • 1...Sc4+
        • 2.Qxc4#
      • 1...Sd7+
        • 2.Qxd7#
      • 1...Sc6
        • 2.Qc4#
      • 1...Sf6
        • 2.Qxe5#
      • 1...Sf4!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qe3#
      • 1...Sc4+
        • 2.Rxc4#
      • 1...Sd7+
        • 2.Rxd7#
      • 1...Sxf3
        • 2.Rd5#
      • 1...Qc3
        • 2.Qxc3#
      • 1...Re2
        • 2.Sxe2#
      • 1...Rd3
        • 2.Se2#
      • 1...Sg4
        • 2.Rd5#
        • 2.Rc4#
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(a);SBLOCK::R(H)
    • R(c);N_GUARD::QAB(G)
    • R(c);N_GUARD::QAB(G),XR(c)
    • R(c);SBLOCK::R1(H)
    • S(g);S_CUTB(j)::QAB1(G),XS(f)
  • Tries
    • Try
      • Q(G);N_PINS(f)
      • Threat
        • DUALS(2)
      • Vars
        • S(f);CHECK,N_GUARD::QAR1(G),XS(f)
        • S(g);XS(B)::QAR1(G)
        • P(b);::QAR1(G)
        • S(g);::QAB1(G)
      • Refutation
        • S(f);XQ(G)
    • Try
      • Q(G);N_PINS(f)
      • Threat
        • QAR1(G)
      • Vars
        • S(f);CHECK,N_GUARD::QAR1(G),XS(f)
        • S(f);CHECK,N_GUARD::QAR(G),XS(f)
        • S(f);N_GUARD::QAR1(G)
        • S(g);S_CUTB(j)::QAB1(G),XS(f)
      • Refutation
        • S(g);
  • Actual
    • Q(G);N_PINS(f)
    • Threat
      • QAB1(G)
    • Vars
      • S(f);CHECK,N_GUARD::R1(H),XS(f)
      • S(f);CHECK,N_GUARD::R(H),XS(f)
      • S(f);OGATE,XQ(G)::R1(D)
      • Q(a);N_GUARD::QAB1(G),XQ(a)
      • R(c);N_GUARD::S(B),XR(c)
      • R(c);N_GUARD::S(B)
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