MESON Chess Problem Database

Problem Display
PID: 50032 (8/5p2/3p1Q1K/B7/2B4N/3rk1N1/2b2p2/1R2nr2 w - - 0 1)

Loyd, Sam

St. Louis Globe Democrat, 1886

(First published on Sat May 8 1886)

8/5p2/3p1Q1K/B7/2B4N/3rk1N1/2b2p2/1R2nr2

#2

7 + 8

5206 Sam Loyd and His Chess Problems 1913

SOLUTION

  • SOUND
  • Sets
    • 1...Sg2
      • 2.Sxg2#
    • 1...Sf3
      • 2.Sg2#
    • 1...d5
      • 2.Qe5#
  • Tries
    • 1.Bb6+?
      • 1...Rd4
        • 2.Qxd4#
        • 2.Qg5#
      • 1...Kd2!
    • 1.Rxe1+?
      • 1...Rxe1
        • 2.Sg2#
      • 1...fxe1Q
        • 2.Sg2#
      • 1...fxe1B
        • 2.Sg2#
      • 1...fxe1R
        • 2.Sg2#
      • 1...fxe1S!
    • 1.Qe7+?
      • 1...Kf4
        • 2.Qg5#
      • 1...Kd4!
  • Keys
    • 1.Se2!
      • threat
        • 2.Qe7#
      • 1...Kxe2
        • 2.Qe7#
      • 1...Ke4
        • 2.Qe7#
        • 2.Qf4#
      • 1...Rd1
        • 2.Qf4#
      • 1...Rd2
        • 2.Qf4#
      • 1...Ra3
        • 2.Qd4#
        • 2.Qf4#
      • 1...Rb3
        • 2.Qd4#
        • 2.Qf4#
      • 1...Rc3
        • 2.Qd4#
        • 2.Qf4#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Rd5
        • 2.Qf4#
      • 1...Sf3
        • 2.Qxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::S(D),XS(a)
    • S(a);N_GUARD::S(D)
    • P(g);N_GUARD::QAR2(F)
  • Tries
    • Try
      • B(E);CHECK
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • R(A);CHECK,XS(a)
      • Vars
        • R(b);XR(A)::S(D)
        • P(d);XR(A)::S(D)
      • Refutation
        • P(d);XR(A)
    • Try
      • Q(F);CHECK
      • Vars
        • K(f);S_FLIGHT::QAB1(F)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAR(F)
    • Vars
      • K(f);P-FLIGHT,P_SPINR(e),XS(B)::QAR(F)
      • R(e);::QAB1(F)
      • R(e);N_GUARD::QAB1(F),XR(e)
      • S(a);N_GUARD::QAR1(F),XS(a)
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