MESON Chess Problem Database

Problem Display
PID: 4531 (8/7K/2Rn1N2/6k1/6N1/2n4p/8/4QR2 w - - 0 1)

Loyd, Sam

Chess Record, 1876

8/7K/2Rn1N2/6k1/6N1/2n4p/8/4QR2

#2

6 + 4

5206 Sam Loyd and His Chess Problems 1913
3360 Simple Two-move Themes 1924
45 Schach 1952
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Tries
    • 1.Rf5+?
      • 1...Kxf5
        • 2.Qe5#
      • 1...Sxf5!
    • 1.Rc5+?
      • 1...Sf5
        • 2.Rfxf5#
        • 2.Rcxf5#
      • 1...Sd5!
    • 1.Rxd6?
      • 1...Se2
        • 2.Rd5#
      • 1...Sb1
        • 2.Rd5#
      • 1...Sd1
        • 2.Rd5#
      • 1...Sa2
        • 2.Rd5#
      • 1...Sa4
        • 2.Rd5#
      • 1...Se4
        • 2.Rd5#
      • 1...Sb5
        • 2.Rd5#
      • 1...Sd5
        • 2.Rxd5#
      • 1...h2!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Sxh3#
      • 1...Kf4
        • 2.Sxh3#
      • 1...Kh4
        • 2.S2e4#
      • 1...Kf5
        • 2.Sxh3#
      • 1...Kxf6
        • 2.Sxh3#
      • 1...h2
        • 2.Sh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(c);P-FLIGHT,XR(B)::QAR1(A)
      • Refutation
        • S(d);XR(B)
    • Try
      • R(D);CHECK
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • R(D);XS(d)
      • Vars
        • S(a);N_GUARD::R(D)
        • S(a);N_GUARD::R(D),XS(a)
      • Refutation
        • P(b);
  • Actual
    • S(C);
    • Threat
      • S(C),XP(b)
    • Vars
      • K(c);S_FLIGHT::R(B)+S(C),DCHECK,XP(b)
      • K(c);S_FLIGHT::QAB(A)+S(C)
      • K(c);P-FLIGHT::R(B)+S(C),XP(b)
      • K(c);P_SPINS(d),S_FLIGHT,XS(E)::R(B)+S(C),XP(b)
      • P(b);::S(C)
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