MESON Chess Problem Database

Problem Display
PID: 146755 (8/3R1K2/4P2B/1r2k3/3n3N/3nrp2/2Q5/8 w - - 0 1)

Lipton, Michael

The Problemist, 2012

8/3R1K2/4P2B/1r2k3/3n3N/3nrp2/2Q5/8

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qc7#
    • 1...Sc1
      • 2.Sg6#
    • 1...Se1
      • 2.Sg6#
    • 1...Sb2
      • 2.Sg6#
    • 1...Sf2
      • 2.Sg6#
    • 1...Sb4
      • 2.Sg6#
    • 1...Sf4
      • 2.Bg7#
    • 1...Sc5
      • 2.Sg6#
  • Tries
    • 1.Bg7+?
      • 1...Ke4
        • 2.Rxd4#
      • 1...Kf4!
    • 1.Qh2+?
      • 1...Sf4
        • 2.Qxf4#
      • 1...Ke4!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qxd4#
      • 1...Ke4
        • 2.Qxd4#
      • 1...Sxe6
        • 2.Qxe6#
      • 1...Re4
        • 2.Qc7#
      • 1...Rb4
        • 2.Qd5#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Sc2
        • 2.Bg7#
      • 1...Se2
        • 2.Bg7#
      • 1...Sb3
        • 2.Bg7#
      • 1...Sf5
        • 2.Sg6#
      • 1...Sc6
        • 2.Bg7#

This is a version of 17473

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 7
  • Sets
    • R(b);SBLOCK::QAB(A)
    • S(a);::S(B)
    • S(a);SBLOCK::B(D)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINS(a)::R1(E),XS(d)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
      • Refutation
        • K(f);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XS(d)
    • Vars
      • K(f);P-FLIGHT,P_SPINS(d)::QAR1(A),XS(d)
      • S(d);OGATE,XP(C)::QAR1(A),XS(d)
      • R(b);SBLOCK::QAB(A)
      • R(e);N_GUARD::QAR1(A)
      • R(e);N_GUARD::QAR1(A),XR(e)
      • S(d);::B(D)
      • S(d);SBLOCK::S(B)
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