MESON Chess Problem Database

Problem Display
PID: 178014 (K4B2/p1p3rn/1pk2P2/1N2P1P1/1P2N2p/4p1P1/qPr5/2RRbQ1B w - - 0 1)

Macleod, Norman Alasdair

Probleemblad, 1979

K4B2/p1p3rn/1pk2P2/1N2P1P1/1P2N2p/4p1P1/qPr5/2RRbQ1B

#2

14 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Sf2#
      • 2.Sxa7#
    • 1...Qb3
      • 2.Sxa7#
    • 1...Qc4
      • 2.Sxa7#
    • 1...Qe6
      • 2.Sxa7#
    • 1...Qf7
      • 2.Sxa7#
    • 1...Qg8
      • 2.Sxa7#
    • 1...Qa1
      • 2.Sf2#
    • 1...Qxb2
      • 2.Sf2#
      • 2.Sxa7#
    • 1...Qa3
      • 2.Sf2#
    • 1...Qa4
      • 2.Sf2#
    • 1...Qa5
      • 2.Sf2#
    • 1...Qa6
      • 2.Sf2#
    • 1...a5
      • 2.Sa7#
    • 1...a6
      • 2.Sa7#
  • Tries
    • 1.Sc5+?
      • 1...Qd5
        • 2.Sd4#
        • 2.Sxa7#
        • 2.Bxd5#
      • 1...Rg2!
    • 1.Rxc2+?
      • 1...Qc4
        • 2.Sxa7#
        • 2.Qxc4#
      • 1...Bc3!
    • 1.Qc4+?
      • 1...Qxc4
        • 2.Sxa7#
      • 1...Rxc4!
  • Keys
    • 1.b3!
      • threat
        • 2.Sf2#
      • 1...Qxb3
        • 2.Sxa7#
      • 1...Sxg5
        • 2.Sxg5#
      • 1...Sxf6
        • 2.Sxf6#
      • 1...hxg3
        • 2.Sxg3#
      • 1...Rc4
        • 2.Qxc4#
      • 1...Bd2
        • 2.Sc5#
      • 1...e2
        • 2.Sec3#
      • 1...Rd7
        • 2.Sed6#
      • 1...Bf2
        • 2.Sxf2#
        • 2.Sec3#
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 11
  • Sets
    • Q(b);N_GUARD::S(I),XP(h)
    • Q(b);N_GUARD,N_SPINR(c)::S(I),XP(h)
    • Q(b);N_GUARD,P_PINB(N)::S(I),XP(h)
    • Q(b);N_GUARD::B(D)+S(H)
    • P(h);S_CUTQ(b)::S(I)
  • Tries
    • Try
      • S(H);CHECK,N_PINR(c)
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • R(A);CHECK,XR(c)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(C);CHECK,N_PINR(c)
      • Vars
        • Q(b);XQ(C)::S(I),XP(h)
      • Refutation
        • R(c);P_SPINR(c),XQ(C)
  • Actual
    • P(E);
    • Threat
      • B(D)+S(H)
    • Vars
      • Q(b);N_GUARD,XP(E)::S(I),XP(h)
      • S(k);XP(K)::B(D)+S(H),XS(k)
      • S(k);XP(L)::B(D)+S(H),XS(k)
      • P(e);XP(F)::B(D)+S(H),XP(e)
      • R(c);N_GUARD::QAR2(C),XR(c)
      • B(a);::B(D)+S(H)
      • P(d);::B(D)+S(H)
      • R(j);SBLOCK::B(D)+S(H)
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