MESON Chess Problem Database

Problem Display
PID: 16424 (3nK3/2p5/P5Q1/B1p5/P1kp4/3NpB1p/7q/Nb3nbr w - - 0 1)

Wenman, Francis Percival (aka Percy Wenman)

Fifty Two-Move Problems, 1940

3nK3/2p5/P5Q1/B1p5/P1kp4/3NpB1p/7q/Nb3nbr

#2

8 + 12

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3
      • 2.Sb2#
    • 1...Qf4
      • 2.Sb2#
    • 1...Qe5+
      • 2.Sxe5#
    • 1...Qd6
      • 2.Sb2#
    • 1...Qa2
      • 2.Se5#
    • 1...Qb2
      • 2.Sxb2#
      • 2.Se5#
    • 1...Qc2
      • 2.Se5#
    • 1...Qd2
      • 2.Se5#
    • 1...Qe2
      • 2.Se5#
    • 1...Qf2
      • 2.Se5#
    • 1...Qg2
      • 2.Se5#
    • 1...Bc2
      • 2.Sb2#
    • 1...Bf2
      • 2.Sb2#
    • 1...Sd2
      • 2.Sb2#
    • 1...Sg3
      • 2.Se5#
    • 1...e2
      • 2.Sb2#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Bd5#
      • 1...Qe5+
        • 2.Sxe5#
      • 1...Qd6
        • 2.Sb2#
      • 1...Qg2
        • 2.Se5#
      • 1...c6!
    • 1.Qb6?
      • threat
        • 2.Qb3#
        • 2.Qb5#
      • 1...Qe5+
        • 2.Sxe5#
      • 1...Kxd3
        • 2.Qb3#
      • 1...Ba2
        • 2.Qb5#
      • 1...Qa2
        • 2.Se5#
        • 2.Qb5#
      • 1...Qb2
        • 2.Sxb2#
        • 2.Se5#
      • 1...Qc2
        • 2.Se5#
        • 2.Qb5#
      • 1...Bc2
        • 2.Sb2#
        • 2.Qb5#
      • 1...Sd2
        • 2.Sb2#
        • 2.Qb5#
      • 1...c6
        • 2.Qb3#
      • 1...cxb6!
    • 1.Qe6+?
      • 1...Kxd3
        • 2.Qb3#
      • 1...Sxe6!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Sb2#
      • 1...Qe5+
        • 2.Sxe5#
      • 1...Kxd3
        • 2.Be2#
      • 1...Qxg2
        • 2.Se5#
      • 1...Bxd3
        • 2.Bd5#

Anticipated by 181083(1904)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 13
  • Sets
    • Q(e);N_GUARD::S(B)
    • Q(e);CHECK,N_GUARD::S(B),XQ(e)
    • B(a);S_CUTQ(e)::S(B)
    • B(c);S_CUTQ(e)::S(B)
    • S(b);S_CUTQ(e)::S(B)
    • P(f);S_CUTQ(e)::S(B)
  • Tries
    • Try
      • Q(G);
      • Threat
        • B(C)
      • Vars
        • Q(e);CHECK,N_GUARD::S(B),XQ(e)
        • Q(e);N_GUARD::S(B)
      • Refutation
        • P(k);
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);CHECK,N_GUARD::S(B),XQ(e)
        • K(h);S_FLIGHT,XS(B)::QAR2(G)
        • B(a);::QAB1(G)
        • P(k);::QAB1(G)
      • Refutation
        • P(k);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • K(h);OGATE,S_FLIGHT,XS(B)::QAR2(G)
      • Refutation
        • S(l);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • S(B)
    • Vars
      • Q(e);CHECK,N_GUARD::S(B),XQ(e)
      • K(h);OGATEB,S_FLIGHT,XS(B)::B(C)
      • Q(e);N_GUARD,XQ(G)::S(B)
      • B(a);SBLOCK,XS(B)::B(C)
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