MESON Chess Problem Database

Problem Display
PID: 156288 (6K1/3Q1pp1/8/1p1N4/3q4/3N4/3k4/2R1R3 w - - 0 1)

Kopaev, Viacheslav Georgievich

1st Prize, Shakhmaty (Baku), 1989

6K1/3Q1pp1/8/1p1N4/3q4/3N4/3k4/2R1R3

#2

6 + 5

56 The Problemist 2014
5454 Near Snap 2016
3713 Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.S3b4?
      • threat
        • 2.Rcd1#
      • 1...Qxb4
        • 2.Sxb4#
      • 1...Qxd5
        • 2.Qxd5#
      • 1...Qa1
        • 2.Sc3#
      • 1...Qg4!
    • 1.S5b4?
      • threat
        • 2.Rc2#
      • 1...Qxd3
        • 2.Qxd3#
      • 1...Qxb4
        • 2.Sxb4#
      • 1...Qc5
        • 2.Sxc5#
      • 1...Qb2
        • 2.Sxb2#
      • 1...Qc3
        • 2.Rcd1#
      • 1...Qc4!
    • 1.S5f4?
      • threat
        • 2.Re2#
      • 1...Qxd3
        • 2.Qxd3#
      • 1...Qxf4
        • 2.Sxf4#
      • 1...Qf2
        • 2.Sxf2#
      • 1...Qe3
        • 2.Red1#
      • 1...Qe5
        • 2.Sxe5#
      • 1...Qe4!
    • 1.Rc2+?
      • 1...Kxd3
        • 2.Sb4#
      • 1...Kxc2!
    • 1.Re2+?
      • 1...Kxd3
        • 2.Sf4#
      • 1...Kxe2!
    • 1.Qg4?
      • threat
        • 2.Red1#
        • 2.Qd1#
        • 2.Qe2#
      • 1...Kxd3
        • 2.Red1#
        • 2.Qd1#
        • 2.Qe2#
      • 1...Qxd3
        • 2.Red1#
        • 2.Qd1#
      • 1...Qxd5
        • 2.Qd1#
        • 2.Qe2#
      • 1...Qg1
        • 2.Qd1#
        • 2.Qe2#
      • 1...Qf2
        • 2.Red1#
        • 2.Qd1#
      • 1...Qe3
        • 2.Red1#
        • 2.Qd1#
      • 1...Qe5
        • 2.Red1#
        • 2.Qd1#
      • 1...Qa4
        • 2.Qe2#
      • 1...Qe4
        • 2.Red1#
        • 2.Qd1#
      • 1...Qxg4!
  • Keys
    • 1.S3f4!
      • threat
        • 2.Red1#
      • 1...Qxf4
        • 2.Sxf4#
      • 1...Qxd5
        • 2.Qxd5#
      • 1...Qg1
        • 2.Se3#
      • 1...Qa4
        • 2.Sb4#

Anticipated by 137589(1965-1966), 261633(1977)

This is after 156287

There are these versions: 156289

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • R1(A)
      • Vars
        • Q(b);XS(C)::QAR(E)+S(D),XQ(b)
        • Q(b);OGATE,P_SPINQ(b),XS(D)::QAR(E),XQ(b)
        • Q(b);::QAR(E)+S(D)
      • Refutation
        • Q(b);
    • Try
      • S(D);
      • Threat
        • R1(A)
      • Vars
        • Q(b);OGATE,P_SPINQ(b),XS(C)::QAR1(E),XQ(b)
        • Q(b);XS(D)::QAR(E)+S(C),XQ(b)
        • Q(b);::QAR(E)+S(C),XQ(b)
        • Q(b);SBLOCK::R1(A)
      • Refutation
        • Q(b);
    • Try
      • S(D);
      • Threat
        • R1(B)
      • Vars
        • Q(b);OGATE,P_SPINQ(b),XS(C)::QAR1(E),XQ(b)
        • Q(b);XS(D)::QAR(E)+S(C),XQ(b)
        • Q(b);::QAR(E)+S(C),XQ(b)
        • Q(b);SBLOCK::R1(B)
      • Refutation
        • Q(b);
    • Try
      • R(A);CHECK
      • Vars
        • K(a);P-FLIGHT,XS(C)::S(D)
      • Refutation
        • K(a);P-FLIGHT,XR(A)
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P-FLIGHT,XS(C)::S(D)
      • Refutation
        • K(a);P-FLIGHT,XR(B)
    • Try
      • Q(E);
      • Threat
        • DUALS(3)
      • Vars
        • Q(b);::QAR1(E)
      • Refutation
        • Q(b);XQ(E)
  • Actual
    • S(C);
    • Threat
      • R1(B)
    • Vars
      • Q(b);XS(C)::QAR(E)+S(D),XQ(b)
      • Q(b);OGATE,P_SPINQ(b),XS(D)::QAR(E),XQ(b)
      • Q(b);::QAR(E)+S(D)
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