MESON Chess Problem Database

Problem Display
PID: 91383 (q1n1r3/6Qp/3p4/Rn4P1/1p1Nk2r/8/B2KN3/7b w - - 0 1)

den Toom, Cornelis

Probleemblad, 1993

q1n1r3/6Qp/3p4/Rn4P1/1p1Nk2r/8/B2KN3/7b

#2

7 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Bb1#
    • 1...Rf4
      • 2.Sg3#
    • 1...Sba7
      • 2.Bb1#
    • 1...Sc7
      • 2.Bb1#
    • 1...d5
      • 2.Bb1#
  • Tries
    • 1.Qf6?
      • threat
        • 2.Sg3#
        • 2.Qf5#
      • 1...Sxd4
        • 2.Sg3#
      • 1...b3
        • 2.Qf5#
      • 1...Qd5
        • 2.Sg3#
        • 2.Bb1#
      • 1...Rh2
        • 2.Qf4#
        • 2.Qf5#
      • 1...Rh3
        • 2.Qf4#
        • 2.Qf5#
      • 1...Rf4
        • 2.Sg3#
        • 2.Qxf4#
      • 1...Rg4
        • 2.Qf5#
      • 1...Rf8
        • 2.Sg3#
        • 2.Qe6#
      • 1...Se7
        • 2.Sg3#
        • 2.Qe6#
      • 1...Re5!
    • 1.Qg6+?
      • 1...Ke5
        • 2.Qf5#
      • 1...hxg6!
    • 1.Qxh7+?
      • 1...Ke5
        • 2.Qf5#
      • 1...Rxh7!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qf5#
      • 1...Ke5
        • 2.Qf5#
      • 1...Sxd4
        • 2.Sg3#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Rf4
        • 2.Qxf4#
      • 1...Re5
        • 2.Bb1#
      • 1...Rf8
        • 2.Qe6#
      • 1...Se7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(h);P_PINS(D),SBLOCK::B(A)
    • R(d);SBLOCK::S(C)
    • S(e);::B(A)
    • P(f);SBLOCK::B(A)
  • Tries
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);XS(D)::S(C)
        • P(b);::QAB1(G)
        • R(d);::QAB1(G)
      • Refutation
        • R(j);
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINS(e)::QAR1(G)
      • Refutation
        • P(g);XQ(G)
    • Try
      • Q(G);CHECK,XP(g)
      • Vars
        • K(c);P-FLIGHT,P_SPINS(e)::QAR1(G)
      • Refutation
        • R(d);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • K(c);P-FLIGHT,P_SPINS(e)::QAR1(G)
      • S(e);SBLOCK,XS(D)::S(C)
      • Q(h);N_GUARD,P_PINS(D)::QAB1(G),XQ(h)
      • R(d);N_GUARD::QAR1(G),XR(d)
      • R(j);SBLOCK::B(A)
      • R(j);N_GUARD::QAR2(G)
      • S(i);S_CUTR(j)::QAR2(G)
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