MESON Chess Problem Database

Problem Display
PID: 155753 (2Q1b3/1P1PKp2/4p3/2Bk4/2n2r2/3N2N1/1n1qP3/2RR4 w - - 0 1)

Lipton, Michael

The Problemist Supplement, 2015

2Q1b3/1P1PKp2/4p3/2Bk4/2n2r2/3N2N1/1n1qP3/2RR4

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.e4#
    • 1...Rf2
      • 2.e4#
    • 1...Rf3
      • 2.e4#
    • 1...Rf5
      • 2.e4#
    • 1...Rf6
      • 2.e4#
    • 1...Se5
      • 2.Sxf4#
    • 1...e5
      • 2.Sb4#
  • Tries
    • 1.d8Q+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...Bd7!
    • 1.d8R+?
      • 1...Sd6
        • 2.Rxd6#
      • 1...Bd7!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Qc5#
      • 1...Qb4+
        • 2.Sxb4#
      • 1...Kxd4
        • 2.Qc5#
      • 1...Sxd3
        • 2.Qxc4#
      • 1...Qa5
        • 2.Sxf4#
      • 1...Sa4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • R(d);N_GUARD::P(C)
    • S(c);SBLOCK::S(D),XR(d)
    • P(f);SBLOCK::S(D)
  • Tries
    • Try
      • P(H);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR1(H),XS(c)
      • Refutation
        • B(h);P_SPINB(h)
    • Try
      • P(H);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::R1(H),XS(c)
      • Refutation
        • B(h);P_SPINB(h)
  • Actual
    • B(F);
    • Threat
      • QAR1(J)
    • Vars
      • Q(b);CHECK,N_GUARD::S(D),XQ(b)
      • K(e);P-FLIGHT,XB(F)::QAB1(J)
      • S(a);N_GUARD,XS(D)::QAB1(J),XS(c)
      • Q(b);N_GUARD::S(D),XR(d)
      • S(a);N_GUARD::QAB1(J),XS(c)
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