MESON Chess Problem Database

Problem Display
PID: 137589 (2K5/3pQ3/2p5/2p1N1p1/4q3/4N3/p3k3/3R1R2 w - - 0 1)

Pituk, Alexander

4th Comm., BCF 110. Ty., 1965-1966

2K5/3pQ3/2p5/2p1N1p1/4q3/4N3/p3k3/3R1R2

#2

6 + 7

5454 Near Snap 2016

SOLUTION

  • SOUND
  • Tries
    • 1.S5c4?
      • threat
        • 2.Rd2#
      • 1...Qxe3
        • 2.Qxe3#
      • 1...Qxc4
        • 2.Sxc4#
      • 1...Qc2
        • 2.Sxc2#
      • 1...Qd3
        • 2.Rde1#
      • 1...Qd5
        • 2.Sxd5#
      • 1...Qd4!
    • 1.S5g4?
      • threat
        • 2.Rf2#
      • 1...Qxe3
        • 2.Qxe3#
      • 1...Qxg4
        • 2.Sxg4#
      • 1...Qg2
        • 2.Sxg2#
      • 1...Qf3
        • 2.Rfe1#
      • 1...Qf5
        • 2.Sxf5#
      • 1...Qf4!
    • 1.Rd2+?
      • 1...Kxe3
        • 2.Sc4#
      • 1...Kxd2!
    • 1.Rf2+?
      • 1...Kxe3
        • 2.Sg4#
      • 1...Kxf2!
  • Keys
    • 1.S3g4!
      • threat
        • 2.Rfe1#
      • 1...Qxg4
        • 2.Sxg4#
      • 1...Qxe5
        • 2.Qxe5#
      • 1...Qh1
        • 2.Sf3#
      • 1...Qb4
        • 2.Sc4#

This anticipates 261633(1977), 156288(1989), 156289(2014)

FEATURES

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