MESON Chess Problem Database

Problem Display
PID: 4856 (6r1/6p1/4N2B/4N1R1/8/4k2K/1Q6/8 w - - 0 1)

Loyd, Sam

NY State Chess Association, 1892

6r1/6p1/4N2B/4N1R1/8/4k2K/1Q6/8

#2

6 + 3

15 British Chess Magazine 1910
5206 Sam Loyd and His Chess Problems 1913
3360 Simple Two-move Themes 1924
887 Mate in Two Moves 1931
5062 111 Selected Problems by Famous Composers 1945
81 Chess 1953
5065 Chess Problem Gems by Eight Eminent American Composers 1972
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qd4#
  • Tries
    • 1.Sc4+?
      • 1...Kf3
        • 2.Qg2#
      • 1...Ke4
        • 2.Qe2#
      • 1...Kd3!
    • 1.Sg4+?
      • 1...Kf3
        • 2.Qg2#
      • 1...Ke4
        • 2.Qe2#
      • 1...Kd3!
    • 1.Sc5?
      • threat
        • 2.Rg3#
        • 2.Rxg7#
      • 1...Kf4
        • 2.Qc1#
        • 2.Qd4#
        • 2.Qd2#
        • 2.Qf2#
      • 1...Rf8
        • 2.Rg3#
      • 1...Rh8
        • 2.Rg3#
      • 1...g6
        • 2.Rg3#
        • 2.Rxg6#
      • 1...gxh6!
    • 1.Rg1+?
      • 1...gxh6
        • 2.Re1#
      • 1...g5
        • 2.Re1#
      • 1...Ke4!
    • 1.Rg2+?
      • 1...gxh6
        • 2.Re2#
        • 2.Qd4#
        • 2.Qe2#
      • 1...g5
        • 2.Re2#
        • 2.Qd4#
        • 2.Qe2#
      • 1...Ke4!
    • 1.Qc1+?
      • 1...Ke2
        • 2.Rg2#
      • 1...Kf2
        • 2.Rg2#
      • 1...Ke4!
    • 1.Qb1?
      • threat
        • 2.Qe1#
      • 1...Ke2
        • 2.Rg2#
      • 1...Kf2
        • 2.Rg2#
      • 1...Kd2!
    • 1.Qc2?
      • threat
        • 2.Rg3#
        • 2.Rxg7#
      • 1...Rf8
        • 2.Rg3#
      • 1...Rh8
        • 2.Rg3#
      • 1...g6
        • 2.Rg3#
        • 2.Rxg6#
      • 1...gxh6!
    • 1.Qd2+?
      • 1...Ke4
        • 2.Sc5#
        • 2.Qd3#
        • 2.Qd4#
      • 1...Kxd2!
    • 1.Qf2+?
      • 1...Ke4
        • 2.Qd4#
        • 2.Qf3#
      • 1...Kxf2!
    • 1.Qg2?
      • threat
        • 2.Rg3#
        • 2.Rxg7#
      • 1...Rf8
        • 2.Rg3#
      • 1...Rh8
        • 2.Rg3#
      • 1...g6
        • 2.Rg3#
        • 2.Rxg6#
      • 1...gxh6!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qe1#
      • 1...Kd2
        • 2.Rg2#
      • 1...Ke2
        • 2.Rg2#
      • 1...Kf2
        • 2.Rg2#
      • 1...Ke4
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR1(A)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::B(F)+R(D),DCHECK
        • R(c);P_PINB(F)::B(F)+R(D),DCHECK
      • Refutation
        • P(b);XB(F)
    • Try
      • R(D);CHECK
      • Vars
        • P(b);XB(F)::R(D)
        • P(b);P_SPINP(b)::R(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R(D)
        • K(a);S_FLIGHT::R1(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • K(a);P-FLIGHT::R(D)
        • K(a);S_FLIGHT::R1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::B(F)+R(D),DCHECK
        • R(c);P_PINB(F)::B(F)+R(D),DCHECK
      • Refutation
        • P(b);XB(F)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::B(F)+R(D),DCHECK
        • R(c);P_PINB(F)::B(F)+R(D),DCHECK
      • Refutation
        • P(b);XB(F)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(a);S_FLIGHT::B(F)+R(D),DCHECK
      • K(a);P-FLIGHT::R(D)
      • K(a);S_FLIGHT::R1(D)
      • K(a);P-FLIGHT::QAR1(A)
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