MESON Chess Problem Database

Problem Display
PID: 139938 (2K2R2/p1Q5/1p6/1B6/4p1r1/1n2k3/p5p1/rn1R4 w - - 0 1)

Chepizhni, Viktor Ivanovich

Sp. Prize, Moscow Ty., 2003

2K2R2/p1Q5/1p6/1B6/4p1r1/1n2k3/p5p1/rn1R4

#2

5 + 10

6167 Viktor Chepizhny 2007
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.Qxg3#
      • 2.Qf4#
    • 1...Rf4
      • 2.Qxf4#
    • 1...Rh4
      • 2.Qg3#
    • 1...Rg5
      • 2.Qf4#
    • 1...Rg6
      • 2.Qf4#
    • 1...Rg7
      • 2.Qf4#
    • 1...Rg8
      • 2.Qf4#
    • 1...S1d2
      • 2.Qc3#
    • 1...Sa3
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxc3#
  • Tries
    • 1.Re1+?
      • 1...Kd4
        • 2.Rd8#
      • 1...Kd2!
    • 1.Qxb6+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...axb6!
    • 1.Qc2?
      • threat
        • 2.Qe2#
        • 2.Qf2#
      • 1...Rf4
        • 2.Qe2#
      • 1...S1d2
        • 2.Qc3#
      • 1...g1Q
        • 2.Qe2#
      • 1...g1S
        • 2.Qf2#
      • 1...g1B
        • 2.Qe2#
      • 1...Sc3
        • 2.Qf2#
        • 2.Qxc3#
      • 1...Sc1
        • 2.Qf2#
      • 1...Sd4
        • 2.Qf2#
      • 1...S3d2!
    • 1.Qc4?
      • threat
        • 2.Qe2#
      • 1...S1d2
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sc1
        • 2.Qd4#
      • 1...S3d2
        • 2.Re1#
      • 1...Sd4
        • 2.Qxd4#
      • 1...g1S!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qg1#
      • 1...Rf4
        • 2.Qxf4#
      • 1...g1Q
        • 2.Qe2#
      • 1...g1S
        • 2.Qf2#
      • 1...g1B
        • 2.Qe2#
      • 1...g1R
        • 2.Qe2#
        • 2.Qf2#

Anticipated by 243154(1972)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(h);N_GUARD::QAB1(C),XR(h)
    • R(h);N_GUARD::QAR2(C)
    • R(h);N_GUARD::QAB1(C)
    • R(h);N_GUARD,P_PINR(E)::QAB1(C)
    • S(b);N_GUARD::QAR2(C)
    • S(b);N_GUARD::QAR2(C),XS(b)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(f);S_FLIGHT::R(E)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(C);CHECK,XP(i)
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB1(C),XS(e)
        • S(e);N_GUARD,P_SPINS(e)::QAB(C),XS(e)
      • Refutation
        • P(j);XQ(C)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(h);::QAR1(C)
        • S(b);N_GUARD::QAR2(C)
        • P(d);::QAR1(C)
        • P(d);::QAB1(C)
        • S(e);::QAB1(C)
      • Refutation
        • S(e);
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • S(b);N_GUARD::QAR2(C)
        • S(b);N_GUARD::QAR2(C),XS(b)
        • S(e);N_GUARD::QAB1(C)
        • S(e);SBLOCK::R(A)
        • S(e);N_GUARD::QAB1(C),XS(e)
      • Refutation
        • P(d);
  • Actual
    • Q(C);
    • Threat
      • QAB(C)
    • Vars
      • R(h);N_GUARD::QAB1(C),XR(h)
      • P(d);OGATE::QAR1(C)
      • P(d);OGATE::QAB1(C)
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