MESON Chess Problem Database

Problem Display
PID: 250815 (7q/1N2Q3/3p2r1/1n1PbR1n/R1Pk1p2/5P2/1KPP3B/5B2 w - - 0 1)

Raisanen, Jaakko

Schweizerische Schachzeitung, 1999

7q/1N2Q3/3p2r1/1n1PbR1n/R1Pk1p2/5P2/1KPP3B/5B2

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Bxg1#
    • 1...Re6
      • 2.Bg1#
    • 1...Rf6
      • 2.Bg1#
    • 1...Rh6
      • 2.Bg1#
    • 1...Bf6
      • 2.Qe4#
      • 2.cxb5#
      • 2.c5#
    • 1...Bg7
      • 2.Qe4#
      • 2.cxb5#
      • 2.c5#
    • 1...Sa3
      • 2.c3#
    • 1...Sa7
      • 2.c3#
    • 1...Sc7
      • 2.c3#
    • 1...Sg3
      • 2.Bg1#
  • Tries
    • 1.Rxf4+?
      • 1...Bxf4
        • 2.Qe4#
      • 1...Sxf4!
    • 1.Qd8?
      • threat
        • 2.Qb6#
      • 1...Sc7
        • 2.c3#
      • 1...Qxd8!
  • Keys
    • 1.Qxd6!
      • threat
        • 2.Qc5#
        • 2.cxb5#
        • 2.c5#
      • 1...Rxd6
        • 2.Bg1#
      • 1...Bxd6
        • 2.c5#
      • 1...Sxd6
        • 2.c3#
      • 1...Qa8
        • 2.Qc5#
        • 2.Qxe5#
      • 1...Qc8
        • 2.Qxe5#
        • 2.c5#
      • 1...Qf8
        • 2.Qxe5#
        • 2.cxb5#
        • 2.c5#
      • 1...Sa3
        • 2.Qc5#
        • 2.c3#
      • 1...Sc3
        • 2.Qc5#
      • 1...Sa7
        • 2.Qc5#
        • 2.c3#
        • 2.c5#
      • 1...Sc7
        • 2.Qc5#
        • 2.c3#
        • 2.c5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • R(g);N_GUARD::B(E),XR(g)
    • R(g);N_GUARD::B(E)
    • S(c);N_GUARD::P(C)
    • S(e);S_CUTR(g)::B(E)
  • Tries
    • Try
      • R(J);CHECK,XP(b)
      • Vars
        • B(d);OGATE,XR(J)::QAR1(L)
      • Refutation
        • S(e);XR(J)
    • Try
      • Q(L);
      • Threat
        • QAB(L)
      • Vars
        • S(c);N_GUARD::P(C)
      • Refutation
        • Q(h);XQ(L)
  • Actual
    • Q(L);XP(f)
    • Threat
      • DUALS(3)
    • Vars
      • R(g);N_GUARD,XQ(L)::B(E)
      • B(d);XQ(L)::R(G)+P(H)
      • S(c);N_GUARD,XQ(L)::P(C)
      • S(c);::QAB1(L)
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