MESON Chess Problem Database

Problem Display
PID: 152158 (8/7Q/6K1/7P/8/2ppp3/3P4/R1NkN1R1 w - - 0 1)

Henriksen, Thorleif Cammillo

4th HM., Good Companions (May Meredith Ty.), 1915

8/7Q/6K1/7P/8/2ppp3/3P4/R1NkN1R1

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...c2
      • 2.Sf3#
    • 1...e2
      • 2.Sb3#
  • Tries
    • 1.Ra2?
      • threat
        • 2.Sg2#
        • 2.Sexd3#
        • 2.Sf3#
      • 1...Kxc1
        • 2.Sg2#
        • 2.Sxd3#
        • 2.Sf3#
      • 1...c2
        • 2.Sf3#
      • 1...e2!
    • 1.Rg2?
      • threat
        • 2.Sa2#
        • 2.Sb3#
        • 2.Scxd3#
      • 1...Kxe1
        • 2.Sa2#
        • 2.Sb3#
        • 2.Sxd3#
      • 1...e2
        • 2.Sb3#
      • 1...c2!
    • 1.Qb7?
      • 1...cxd2
        • 2.Qb3#
      • 1...exd2
        • 2.Qf3#
      • 1...c2
        • 2.Sf3#
      • 1...e2
        • 2.Sb3#
      • 1...Kxd2!
    • 1.Qf7?
      • 1...cxd2
        • 2.Qb3#
      • 1...exd2
        • 2.Qf3#
      • 1...c2
        • 2.Sf3#
      • 1...e2
        • 2.Sb3#
      • 1...Kxd2!
  • Keys
    • 1.Qd7!
      • 1...Kxd2
        • 2.Qxd3#
      • 1...cxd2
        • 2.Qa4#
      • 1...exd2
        • 2.Qg4#
      • 1...c2
        • 2.Sf3#
      • 1...e2
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::R(D)+S(C)
    • P(d);SBLOCK::R(A)+S(B)
  • Tries
    • Try
      • R(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(b);::R(D)+S(C)
      • Refutation
        • P(d);
    • Try
      • R(D);
      • Threat
        • DUALS(3)
      • Vars
        • P(d);::R(A)+S(B)
      • Refutation
        • P(b);
    • Try
      • Q(H);
      • Vars
        • P(b);N_GUARD,SBLOCK,XP(E)::QAB(H)
        • P(d);N_GUARD,SBLOCK,XP(E)::QAB(H)
        • P(b);SBLOCK::R(D)+S(C)
        • P(d);SBLOCK::R(A)+S(B)
      • Refutation
        • K(a);P-FLIGHT,XP(E)
    • Try
      • Q(H);
      • Vars
        • P(b);N_GUARD,SBLOCK,XP(E)::QAB(H)
        • P(d);N_GUARD,SBLOCK,XP(E)::QAB(H)
        • P(b);SBLOCK::R(D)+S(C)
        • P(d);SBLOCK::R(A)+S(B)
      • Refutation
        • K(a);P-FLIGHT,XP(E)
  • Actual
    • Q(H);
    • Vars
      • K(a);OGATEB,P-FLIGHT,P_SPINP(c),XP(E)::QAR1(H),XP(c)
      • P(b);N_GUARD,SBLOCK,XP(E)::QAB(H)
      • P(d);N_GUARD,SBLOCK,XP(E)::QAB(H)
      • P(b);SBLOCK::R(D)+S(C)
      • P(d);SBLOCK::R(A)+S(B)
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