MESON Chess Problem Database

Problem Display
PID: 46955 (7B/5R2/3p3N/1p1P4/1K2k2r/4N3/4Q3/8 w - - 0 1)

Loyd, Sam

New York State Chess Association, 1892

7B/5R2/3p3N/1p1P4/1K2k2r/4N3/4Q3/8

#2

7 + 4

5206 Sam Loyd and His Chess Problems 1913

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Re7#
  • Tries
    • 1.Kc3?
      • threat
        • 2.Qd3#
        • 2.Qf3#
      • 1...Rh3
        • 2.Qd3#
      • 1...Rf4
        • 2.Re7#
      • 1...b4+!
    • 1.Sef5+?
      • 1...Kf4
        • 2.Qe3#
      • 1...Kxd5+!
    • 1.Qd1?
      • threat
        • 2.Qd4#
      • 1...Rf4
        • 2.Re7#
      • 1...Kxe3+!
  • Keys
    • 1.Rg7!
      • 1...Ke5+
        • 2.Rg4#
      • 1...Kd4
        • 2.Rg4#
        • 2.Re7#
      • 1...Kf4
        • 2.Sg2#
      • 1...Rxh6
        • 2.Rg4#
      • 1...Rh1
        • 2.Rg4#
      • 1...Rh2
        • 2.Rg4#
      • 1...Rh3
        • 2.Rg4#
      • 1...Rf4
        • 2.Re7#
      • 1...Rg4
        • 2.Rxg4#
      • 1...Rh5
        • 2.Rg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK::R(F)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(b);P_PINS(B)::QAB1(A)
        • R(b);SBLOCK::R(F)
      • Refutation
        • P(c);CHECK
    • Try
      • S(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);CHECK,S_FLIGHT,XP(D)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • R(b);SBLOCK::R(F)
      • Refutation
        • K(a);CHECK,P-FLIGHT,XS(B)
  • Actual
    • R(F);
    • Vars
      • K(a);CHECK,P-FLIGHT::B(G)+R(F)
      • K(a);P-FLIGHT::S(B)
      • R(b);N_GUARD,XS(E)::R(F)
      • R(b);N_GUARD::R(F)
      • R(b);SBLOCK::R(F)
      • R(b);N_GUARD::R(F),XR(b)
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