MESON Chess Problem Database

Problem Display
PID: 187754 (8/N5BB/1PR1P1p1/1p1kn3/1P2n3/8/4Q3/K1N5 w - - 0 1)

Mackenzie, Arthur Ford

The Houston Post, 1909

8/N5BB/1PR1P1p1/1p1kn3/1P2n3/8/4Q3/K1N5

#2

10 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qd3#
    • 1...Sd2
      • 2.Qxe5#
    • 1...Sf2
      • 2.Qxe5#
    • 1...Sc3
      • 2.Qxe5#
    • 1...Sg3
      • 2.Qxe5#
    • 1...Sg5
      • 2.Qxe5#
    • 1...Sd6
      • 2.Qxe5#
    • 1...Sd3
      • 2.Qxd3#
      • 2.Qa2#
    • 1...Sf3
      • 2.Qa2#
    • 1...Sc4
      • 2.Qd3#
    • 1...Sg4
      • 2.Qd3#
      • 2.Qa2#
    • 1...Sd7
      • 2.Qd3#
      • 2.Qa2#
    • 1...Sf7
      • 2.Qd3#
      • 2.Qa2#
    • 1...g5
      • 2.Qxe4#
  • Tries
    • 1.Bxe5?
      • 1...Sd2
        • 2.Rd6#
      • 1...Sf2
        • 2.Rd6#
      • 1...Sc3
        • 2.Rd6#
      • 1...Sg3
        • 2.Rd6#
      • 1...Sc5
        • 2.Rd6#
      • 1...Sg5
        • 2.Rd6#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Sf6
        • 2.Rd6#
      • 1...g5
        • 2.Qxe4#
      • 1...Kxe5!
    • 1.Qd1+?
      • 1...Sd3
        • 2.Qb3#
        • 2.Qxd3#
      • 1...Sd2!
    • 1.Qxb5+?
      • 1...Kd4
        • 2.Qd3#
      • 1...Sc5!
    • 1.Qd2+?
      • 1...Sd3
        • 2.Qa2#
        • 2.Qxd3#
      • 1...Sxd2!
  • Keys
    • 1.Sc8!
      • 1...Kd4
        • 2.Qd3#
      • 1...Kxc6
        • 2.Qxe4#
      • 1...Sxc6
        • 2.Qa2#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Sd2
        • 2.Rd6#
      • 1...Sf2
        • 2.Rd6#
      • 1...Sc3
        • 2.Rd6#
      • 1...Sg3
        • 2.Rd6#
      • 1...Sc5
        • 2.Rd6#
      • 1...Sg5
        • 2.Rd6#
      • 1...Sf6
        • 2.Rd6#
      • 1...Sd3
        • 2.Se7#
      • 1...Sf3
        • 2.Se7#
      • 1...Sc4
        • 2.Se7#
      • 1...Sg4
        • 2.Se7#
      • 1...Sd7
        • 2.Se7#
      • 1...Sf7
        • 2.Se7#
      • 1...g5
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 8
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,P_SPINS(d)::QAR1(C)
    • S(a);OGATE::QAR1(C),XS(d)
    • S(d);N_GUARD::QAB(C)
    • S(d);N_GUARD::QAR2(C)
    • P(e);::QAB1(C),XS(a)
  • Tries
    • Try
      • B(I);XS(d)
      • Vars
        • S(a);N_GUARD::R1(F)
        • S(a);N_GUARD::R1(F),XS(a)
        • P(e);::QAB1(C),XS(a)
      • Refutation
        • K(c);P-FLIGHT,P_SPINS(a),XB(I)
    • Try
      • Q(C);CHECK
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(C);CHECK,XP(b)
      • Vars
        • K(c);P-FLIGHT,P_SPINS(d)::QAR1(C)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(C);CHECK
      • Refutation
        • S(a);XQ(C)
  • Actual
    • S(H);
    • Vars
      • K(c);P-FLIGHT,P_SPINS(d)::QAR1(C)
      • K(c);S_FLIGHT,XR(F)::QAB(C),XS(a)
      • S(d);N_GUARD,SBLOCK,XR(F)::QAB(C)
      • S(a);N_GUARD::R1(F),XS(a)
      • S(a);N_GUARD::R1(F)
      • S(d);::S(H)
      • P(e);::QAB1(C),XS(a)
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