MESON Chess Problem Database

Problem Display
PID: 272672 (q1nQ4/4p2B/7r/p4P2/R1P1kpN1/b5P1/3pP3/3Kn3 w - - 0 1)

Lubell, Martin S

The Problemist, 1957

q1nQ4/4p2B/7r/p4P2/R1P1kpN1/b5P1/3pP3/3Kn3

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Qxd5#
    • 1...Qa6
      • 2.Qd5#
    • 1...Qa7
      • 2.Qd5#
    • 1...Qb8
      • 2.Qd5#
    • 1...Ra6
      • 2.f6#
    • 1...Rb6
      • 2.f6#
    • 1...Rc6
      • 2.Qd5#
      • 2.f6#
    • 1...Re6
      • 2.fxe6#
      • 2.f6#
    • 1...Bc1
      • 2.c5#
    • 1...Sc2
      • 2.Qd3#
    • 1...Sg2
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sf3
      • 2.Qd3#
  • Tries
    • 1.f6+?
      • 1...Rg6
        • 2.Bxg6#
      • 1...Rxh7!
  • Keys
    • 1.Qxd2!
      • threat
        • 2.Qxf4#
      • 1...fxg3
        • 2.Qe3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Qb8
        • 2.Qd5#
      • 1...Rd6
        • 2.f6#
      • 1...Bc1
        • 2.c5#
      • 1...Bd6
        • 2.c5#
      • 1...Sg2
        • 2.Qd3#
      • 1...f3
        • 2.Qe3#
        • 2.Qf4#
      • 1...e5
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • Q(i);N_GUARD::QAB1(I),XQ(i)
    • Q(i);N_GUARD::QAB1(I)
    • R(g);N_GUARD::B(H)+P(G)
    • B(c);N_GUARD::R(D)+P(E)
    • S(a);N_GUARD::QAB1(I)
    • S(a);N_GUARD::QAB1(I),XS(a)
  • Tries
    • Try
      • P(G);CHECK
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::B(H),XR(g)
      • Refutation
        • R(g);XB(H)
  • Actual
    • Q(I);XP(b)
    • Threat
      • QAR1(I),XP(e)
    • Vars
      • P(e);N_GUARD,XP(C)::QAR1(I)
      • S(a);N_GUARD::QAB1(I),XS(a)
      • Q(i);N_GUARD,P_PINQ(I)::QAB1(I),XQ(i)
      • Q(i);N_GUARD::QAB1(I)
      • R(g);N_GUARD,P_PINQ(I)::B(H)+P(G)
      • B(c);N_GUARD::R(D)+P(E)
      • S(a);N_GUARD::QAB1(I)
      • P(h);SBLOCK::S(F)
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