MESON Chess Problem Database

Problem Display
PID: 258769 (3rqR1b/Q7/4k3/1N1nN2R/B3nP1B/3brp2/4p2K/8 w - - 0 1)

Lipton, Michael

2nd Prize, Springaren, 2020

3rqR1b/Q7/4k3/1N1nN2R/B3nP1B/3brp2/4p2K/8

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Qf7#
    • 1...Qf7
      • 2.Qxf7#
    • 1...Rd6
      • 2.Sd4#
    • 1...Bxe5
      • 2.Rxe5#
    • 1...Sd6
      • 2.Sd4#
  • Tries
    • 1.Rxe8+?
      • 1...Rxe8
        • 2.Qd7#
        • 2.Qf7#
      • 1...Se7!
  • Keys
    • 1.Sf7!
      • threat
        • 2.f5#
      • 1...Qxf7
        • 2.Qxf7#
      • 1...Sxf4
        • 2.Sc7#
      • 1...Sg5
        • 2.Sxg5#
      • 1...Sc7
        • 2.Sxc7#
      • 1...Be5
        • 2.Rxe5#
      • 1...Sd2
        • 2.Sg5#
      • 1...Sf2
        • 2.Sg5#
      • 1...Sec3
        • 2.Sg5#
      • 1...Sg3
        • 2.Sg5#
      • 1...Sc5
        • 2.Sg5#
      • 1...Sd6
        • 2.Sg5#
      • 1...Sef6
        • 2.Sd4#
      • 1...Sdc3
        • 2.Sc7#
      • 1...Sb4
        • 2.Sc7#
      • 1...Sb6
        • 2.Sc7#
      • 1...Sdf6
        • 2.Re5#
      • 1...Se7
        • 2.Sc7#

This is after 11586

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 14
    • REMOVED MATES = 2
  • Sets
    • Q(i);N_GUARD::QAB1(H)
    • Q(i);N_GUARD::QAB1(H),XQ(i)
    • R(h);SBLOCK::S(E)
    • B(j);OGATE,P_PINP(C),XS(F)::R1(G),XB(j)
    • S(e);SBLOCK::S(E)
  • Tries
    • Try
      • R(I);CHECK,XQ(i)
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • S(F);
    • Threat
      • P(C)
    • Vars
      • Q(i);OGATE,XS(F)::QAB1(H),XQ(i)
      • S(f);N_GUARD,XP(C)::S(E)
      • S(e);N_GUARD::S(F),XS(e)
      • S(f);N_GUARD::S(E),XS(f)
      • B(j);N_GUARD,P_PINP(C)::R1(G),XB(j)
      • S(e);N_GUARD::S(F)
      • S(e);S_CUTB(j)::S(E)
      • S(f);N_GUARD::S(E)
      • S(f);S_CUTB(j)::R1(G)
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Developed and maintained by Brian Stephenson.
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