MESON Chess Problem Database

Problem Display
PID: 58071 (8/7n/7B/3PPp2/R2Nk3/3N1p2/1Q6/7K w - - 0 1)

Haring, Jacobus

3rd HM., Gamage MT (Chess Life), 1957-1958

8/7n/7B/3PPp2/R2Nk3/3N1p2/1Q6/7K

#2

8 + 4

268 Chess Life 1959

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd3
      • 2.Qc2#
    • 1...Kxd5
      • 2.Qb7#
  • Tries
    • 1.Sf2+?
      • 1...Kxd5
        • 2.Qb5#
      • 1...Kxe5!
    • 1.Sc2+?
      • 1...Kxd3
        • 2.Se1#
      • 1...Kxd5!
    • 1.Se2+?
      • 1...Kxd3
        • 2.Sc1#
        • 2.Rd4#
        • 2.Qd2#
      • 1...Kxd5!
    • 1.Sb3+?
      • 1...Kxd3
        • 2.Sc1#
        • 2.Sc5#
        • 2.Rd4#
        • 2.Qd2#
      • 1...Kxd5!
    • 1.Sxf3+?
      • 1...Kxd3
        • 2.Se1#
        • 2.Rd4#
        • 2.Qd2#
      • 1...Kxf3
        • 2.Qf2#
        • 2.Qg2#
      • 1...Kxd5!
    • 1.Sb5+?
      • 1...Kxd3
        • 2.Rd4#
        • 2.Qd2#
      • 1...Kxd5!
    • 1.Sc6+?
      • 1...Kxd3
        • 2.Rd4#
        • 2.Qd2#
      • 1...Kxd5!
    • 1.Se6+?
      • 1...Kxd3
        • 2.Sc5#
        • 2.Rd4#
        • 2.Qd2#
      • 1...Kxd5!
    • 1.Qe2+?
      • 1...Kxd5
        • 2.Qxf3#
      • 1...fxe2!
    • 1.Qf2?
      • threat
        • 2.Qxf3#
      • 1...Kxd3
        • 2.Qe3#
        • 2.Qc2#
        • 2.Qxf3#
      • 1...Kxd5
        • 2.Qxf3#
      • 1...Sg5!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Sc2#
      • 1...Ke3
        • 2.Sxf5#
      • 1...Kxe5
        • 2.Sb5#
      • 1...f2
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(b);OGATEB,S_FLIGHT,XS(C)::QAB1(B)
    • K(b);OGATEB,S_FLIGHT,XP(F)::QAB(B)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);S_FLIGHT,XP(F)::QAR2(B)
      • Refutation
        • K(b);P-FLIGHT,XP(G)
    • Try
      • S(E);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(C)::S(E)
      • Refutation
        • K(b);S_FLIGHT,XP(F)
    • Try
      • S(E);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(F)
    • Try
      • S(E);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(F)
    • Try
      • S(E);CHECK,XP(a)
      • Refutation
        • K(b);S_FLIGHT,XP(F)
    • Try
      • S(E);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(F)
    • Try
      • S(E);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(F)
    • Try
      • S(E);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(F)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT,XP(F)::QAB(B),XP(a)
      • Refutation
        • P(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XP(a)
      • Vars
        • K(b);S_FLIGHT,XP(F)::QAB(B),XP(a)
      • Refutation
        • S(d);
  • Actual
    • S(C);
    • Threat
      • R(D)+S(E)
    • Vars
      • K(b);P-FLIGHT::S(E),XP(c)
      • K(b);P-FLIGHT,XP(G)::QAB(B)+S(E)
      • P(a);N_GUARD::QAR2(B)
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