MESON Chess Problem Database

Problem Display
PID: 234636 (8/8/3b4/8/2Q5/5kNR/K4N2/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2005

8/8/3b4/8/2Q5/5kNR/K4N2/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sd1?
      • threat
        • 2.Qe4#
      • 1...Kg2
        • 2.Qf1#
      • 1...Bf4
        • 2.Qe2#
      • 1...Bxg3!
    • 1.Sg4?
      • threat
        • 2.Qe4#
      • 1...Kg2
        • 2.Qf1#
      • 1...Bf4
        • 2.Qe2#
      • 1...Bxg3!
    • 1.Sgh1+?
      • 1...Bg3
        • 2.Rxg3#
        • 2.Qe4#
      • 1...Kg2!
  • Keys
    • 1.Sfh1!
      • threat
        • 2.Qe4#
      • 1...Kg2
        • 2.Qf1#
      • 1...Ke3
        • 2.Sf1#
      • 1...Bxg3
        • 2.Rxg3#
      • 1...Bf4
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
        • B(b);SBLOCK::QAB1(E)
      • Refutation
        • B(b);P_SPINB(b),XS(C)
    • Try
      • S(B);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
        • B(b);SBLOCK::QAB1(E)
      • Refutation
        • B(b);P_SPINB(b),XS(C)
    • Try
      • S(C);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAB1(E)
    • Vars
      • K(a);S_FLIGHT::QAB1(E)
      • K(a);P-FLIGHT::R(D)+S(C),DCHECK
      • B(b);OGATE,P_SPINB(b),XS(C)::R1(D),XB(b)
      • B(b);SBLOCK::QAB1(E)
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