MESON Chess Problem Database

Problem Display
PID: 167757 (K7/8/1p6/nk6/3Q4/R7/6B1/8 w - - 0 1)

Lincoln, Robert A

3rd HM., Volchek-50 JT, 2016

K7/8/1p6/nk6/3Q4/R7/6B1/8

#2

4 + 3

145 StrateGems 2017
145 StrateGems 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Bf1#
  • Tries
    • 1.Bf1+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Kc6!
    • 1.Bd5?
      • 1...Sb3
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sc6
        • 2.Qc4#
      • 1...Sb7
        • 2.Qc4#
      • 1...Ka6!
    • 1.Rb3+?
      • 1...Ka6
        • 2.Rxb6#
        • 2.Qxb6#
      • 1...Sxb3!
    • 1.Ra4?
      • 1...Sb3
        • 2.Qb4#
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sc6
        • 2.Bf1#
        • 2.Qc4#
      • 1...Sb7
        • 2.Qb4#
        • 2.Qc4#
      • 1...Ka6!
    • 1.Qa4+?
      • 1...Ka6
        • 2.Bb7#
      • 1...Kc5!
    • 1.Qb4+?
      • 1...Ka6
        • 2.Bb7#
      • 1...Kxb4!
  • Keys
    • 1.Qd6!
      • 1...Kc4
        • 2.Bf1#
      • 1...Ka6
        • 2.Bf1#
      • 1...Sb3
        • 2.Bf1#
      • 1...Sc4
        • 2.Bc6#
      • 1...Sc6
        • 2.Bf1#
      • 1...Sb7
        • 2.Bf1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD,SBLOCK::B(A)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(C),XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(A);
      • Vars
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • K(b);P_SPINS(a),S_FLIGHT
    • Try
      • R(B);CHECK
      • Refutation
        • S(a);XR(B)
    • Try
      • R(B);
      • Vars
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • K(b);P_SPINS(a),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P_SPINS(a),S_FLIGHT::B(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P_SPINS(a),S_FLIGHT::B(A)
      • Refutation
        • K(b);P-FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(b);S_FLIGHT::B(A)
      • K(b);P_SPINP(c),P_SPINS(a),S_FLIGHT::B(A)
      • S(a);N_GUARD::B(A)
      • S(a);N_GUARD,SBLOCK::B(A)
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