MESON Chess Problem Database

Problem Display
PID: 80442 (8/8/3B4/p1q5/rp1NP2Q/k1P5/1N6/K7 w - - 0 1)

Corrias, Antonio G

3/4 Prize, Good Companions (December Meredith Ty.), 1917

8/8/3B4/p1q5/rp1NP2Q/k1P5/1N6/K7

#2

7 + 5

3391 Het Half Pin Thema 1924
3713 Snap 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qb6
      • 2.Sc4#
    • 1...Qxd6
      • 2.Sc4#
    • 1...Qa7
      • 2.Sc4#
    • 1...Qc4
      • 2.Sxc4#
    • 1...Qe5
      • 2.Sc4#
    • 1...Qf5
      • 2.Sc4#
    • 1...Qg5
      • 2.Sc4#
    • 1...Qh5
      • 2.Sc4#
    • 1...b3
      • 2.Sb5#
  • Tries
    • 1.Qh3?
      • 1...Qxd4
        • 2.cxd4#
      • 1...Qxd6
        • 2.Sc4#
      • 1...Qxc3
        • 2.Qxc3#
      • 1...bxc3
        • 2.Qxc3#
      • 1...Qb6
        • 2.Sc4#
        • 2.cxb4#
        • 2.c4#
      • 1...Qa7
        • 2.Sc4#
        • 2.cxb4#
        • 2.c4#
      • 1...Qc4
        • 2.Sxc4#
      • 1...Qb5
        • 2.c4#
      • 1...Qd5
        • 2.c4#
      • 1...Qe5
        • 2.Sc4#
      • 1...Qf5
        • 2.Sc4#
      • 1...Qg5
        • 2.Sc4#
      • 1...Qh5
        • 2.Sc4#
      • 1...Qc6
        • 2.c4#
      • 1...Qc7
        • 2.c4#
      • 1...b3
        • 2.Sb5#
      • 1...Qc8!
  • Keys
    • 1.Qg3!
      • 1...Qxd4
        • 2.cxd4#
      • 1...Qxd6
        • 2.Sc4#
      • 1...Qxc3
        • 2.Qxc3#
      • 1...bxc3
        • 2.Qxc3#
      • 1...Qb6
        • 2.Sc4#
        • 2.cxb4#
        • 2.c4#
      • 1...Qa7
        • 2.Sc4#
        • 2.cxb4#
        • 2.c4#
      • 1...Qc4
        • 2.Sxc4#
      • 1...Qb5
        • 2.c4#
      • 1...Qd5
        • 2.c4#
      • 1...Qe5
        • 2.Sc4#
      • 1...Qf5
        • 2.Sc4#
      • 1...Qg5
        • 2.Sc4#
      • 1...Qh5
        • 2.Sc4#
      • 1...Qc6
        • 2.c4#
      • 1...Qc7
        • 2.c4#
      • 1...Qc8
        • 2.c4#
      • 1...b3
        • 2.Sb5#

Anticipated by 158660(1906-1907)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • Q(e);N_GUARD,P_SPINP(c)::S(B)
    • Q(e);N_GUARD,XB(G)::S(B)
    • Q(e);N_GUARD,P_SPINP(c)::S(B),XQ(e)
    • P(c);P_SPINQ(e),SBLOCK::S(D)
  • Tries
    • Try
      • Q(F);
      • Vars
        • Q(e);OGATE,P_SPINP(c),XS(D)::QAR(F)+P(C),XQ(e)
        • Q(e);N_GUARD,XB(G)::S(B)
        • Q(e);OGATE,P_PINS(B),P_SPINP(c),P_SPINQ(e),XP(C)::QAR2(F),XQ(e)
        • P(c);OGATE,P_SPINP(c),P_SPINQ(e),XP(C)::QAR2(F),XP(c)
        • Q(e);N_GUARD,P_SPINP(c)::S(B),XQ(e)
        • Q(e);P_SPINP(c)::QAR(F)+P(C)
        • Q(e);N_GUARD,P_SPINP(c)::S(B)
        • P(c);P_SPINQ(e),SBLOCK::S(D)
      • Refutation
        • Q(e);P_SPINP(c)
  • Actual
    • Q(F);
    • Vars
      • Q(e);OGATE,P_SPINP(c),XS(D)::QAR(F)+P(C),XQ(e)
      • Q(e);N_GUARD,XB(G)::S(B)
      • Q(e);OGATE,P_PINS(B),P_SPINP(c),P_SPINQ(e),XP(C)::QAR2(F),XQ(e)
      • P(c);OGATE,P_SPINP(c),P_SPINQ(e),XP(C)::QAR2(F),XP(c)
      • Q(e);N_GUARD,P_SPINP(c)::S(B),XQ(e)
      • Q(e);P_SPINP(c)::QAR(F)+P(C)
      • Q(e);N_GUARD,P_SPINP(c)::S(B)
      • P(c);P_SPINQ(e),SBLOCK::S(D)
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