MESON Chess Problem Database

Problem Display
PID: 4795 (8/8/8/8/3B1N2/4N3/3RpkPR/1K6 w - - 0 1)

Loyd, Sam

Mail and Express, 1891

8/8/8/8/3B1N2/4N3/3RpkPR/1K6

#2

7 + 2

5206 Sam Loyd and His Chess Problems 1913
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Ke1
      • 2.Rxe2#
  • Tries
    • 1.Sf1+?
      • 1...Kxf1
        • 2.Rh1#
      • 1...Ke1!
    • 1.Sc2+?
      • 1...Kf1
        • 2.Rh1#
      • 1...Kg3!
    • 1.Sc4+?
      • 1...Ke1
        • 2.Rh1#
      • 1...Kf1
        • 2.Rh1#
      • 1...Kg3!
    • 1.Sf5+?
      • 1...Kf1
        • 2.Rh1#
      • 1...Ke1!
    • 1.Sd3+?
      • 1...Kg3
        • 2.Be5#
        • 2.Rh3#
      • 1...Kg1!
    • 1.Rh3?
      • 1...Ke1
        • 2.Rxe2#
      • 1...Kg1!
    • 1.Rh4?
      • 1...Ke1
        • 2.Rxe2#
      • 1...Kg3
        • 2.Sf5#
      • 1...Kg1!
  • Keys
    • 1.Be5!
      • 1...Ke1
        • 2.Rxe2#
      • 1...Kg1
        • 2.Sh3#
      • 1...Kxe3
        • 2.Rxe2#
      • 1...Kg3
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(a),S_FLIGHT::R1(B),XP(a)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT,XS(E)::R(D)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::R(D)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::R(D)
        • K(b);N_SPINP(a),P-FLIGHT::R(D)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::R(D)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • S(G);CHECK
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • R(D);
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::R1(B),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • R(D);
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::R1(B),XP(a)
        • K(b);N_SPINP(a),S_FLIGHT::S(E)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
  • Actual
    • B(F);
    • Vars
      • K(b);N_SPINP(a),S_FLIGHT::R1(B),XP(a)
      • K(b);N_SPINP(a),S_FLIGHT::S(G)
      • K(b);N_SPINP(a),S_FLIGHT,XS(E)::R1(B),XP(a)
      • K(b);N_SPINP(a),S_FLIGHT::B(F)+S(G)
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