MESON Chess Problem Database

Problem Display
PID: 64720 (KB1n4/6p1/N4pP1/2pk4/Q3R1N1/8/6n1/7b w - - 0 1)

Hirst, CA

Chess Amateur (The), 1910

KB1n4/6p1/N4pP1/2pk4/Q3R1N1/8/6n1/7b

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Se3#
    • 1...Se3
      • 2.Sxe3#
    • 1...Sf4
      • 2.Se3#
    • 1...Sh4
      • 2.Se3#
    • 1...Sc6
      • 2.Qc4#
    • 1...c4
      • 2.Qxc4#
    • 1...f5
      • 2.Re5#
  • Tries
    • 1.Se5?
      • threat
        • 2.Qc4#
      • 1...Ke6
        • 2.Qd7#
      • 1...fxe5
        • 2.Rxe5#
      • 1...c4
        • 2.Qxc4#
      • 1...Se3!
    • 1.Rd4+?
      • 1...Ke6
        • 2.Qd7#
      • 1...cxd4!
    • 1.Re8?
      • threat
        • 2.Qe4#
      • 1...c4
        • 2.Qd7#
      • 1...Se1
        • 2.Se3#
      • 1...Se3
        • 2.Sxe3#
      • 1...Sf4
        • 2.Se3#
      • 1...Sh4
        • 2.Se3#
      • 1...f5
        • 2.Re5#
      • 1...Se6!
  • Keys
    • 1.Re7!
      • threat
        • 2.Qe4#
      • 1...c4
        • 2.Qd7#
      • 1...Se6
        • 2.Rd7#
      • 1...Se1
        • 2.Se3#
      • 1...Se3
        • 2.Sxe3#
      • 1...Sf4
        • 2.Se3#
      • 1...Sh4
        • 2.Se3#
      • 1...f5
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(b);N_GUARD::S(C)
    • S(b);N_GUARD::S(C),XS(b)
    • S(g);SBLOCK::QAB1(A)
    • P(c);::QAB1(A),XP(c)
    • P(e);N_GUARD::R1(B)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(A)
      • Vars
        • K(d);S_FLIGHT::QAB1(A)
        • P(e);OGATE,XS(C)::R1(B),XP(e)
        • P(c);::QAB1(A),XP(c)
      • Refutation
        • S(b);
    • Try
      • R(B);CHECK
      • Vars
        • K(d);S_FLIGHT::QAB1(A)
      • Refutation
        • P(c);XR(B)
    • Try
      • R(B);
      • Threat
        • QAB1(A)
      • Vars
        • P(c);SBLOCK::QAR2(A)
        • S(b);N_GUARD::S(C)
        • S(b);N_GUARD::S(C),XS(b)
        • P(e);N_GUARD::R1(B)
      • Refutation
        • S(g);
  • Actual
    • R(B);
    • Threat
      • QAB1(A)
    • Vars
      • P(c);SBLOCK::QAR2(A)
      • S(g);SBLOCK::R(B)
      • S(b);N_GUARD::S(C)
      • S(b);N_GUARD::S(C),XS(b)
      • P(e);N_GUARD::R1(B)
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