MESON Chess Problem Database

Problem Display
PID: 2493 (5K2/2BP2n1/4kN1R/8/3r4/8/4P1Q1/8 w - - 0 1)

Loyd, Sam

American Chronicle and Pastimes of Sport, 1868

5K2/2BP2n1/4kN1R/8/3r4/8/4P1Q1/8

#2

7 + 3

1679 American Chess Nuts 1868
5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Qe4#
    • 1...Rd2
      • 2.Qe4#
    • 1...Rd3
      • 2.Qe4#
    • 1...Ra4
      • 2.Qd5#
    • 1...Rb4
      • 2.Qd5#
    • 1...Rc4
      • 2.Qd5#
    • 1...Re4
      • 2.Qxe4#
    • 1...Rf4
      • 2.Qd5#
    • 1...Rg4
      • 2.Qd5#
    • 1...Rh4
      • 2.Qd5#
    • 1...Rd5
      • 2.Qxd5#
    • 1...Rd6
      • 2.Qe4#
    • 1...Rxd7
      • 2.Qe4#
    • 1...Sf5
      • 2.Qg8#
  • Tries
    • 1.Sg4+?
      • 1...Kf5
        • 2.Se3#
      • 1...Kxd7!
    • 1.Sd5+?
      • 1...Kf5
        • 2.Se3#
        • 2.Se7#
        • 2.Rf6#
        • 2.Qg6#
      • 1...Kxd7!
    • 1.Sh5+?
      • 1...Kf5
        • 2.Sxg7#
        • 2.Rf6#
        • 2.Qg6#
      • 1...Kxd7!
    • 1.Sh7+?
      • 1...Kf5
        • 2.Rf6#
        • 2.Qg6#
      • 1...Kxd7!
    • 1.Se8+?
      • 1...Kf5
        • 2.Sxg7#
        • 2.Rf6#
        • 2.Qg6#
      • 1...Kxd7!
    • 1.Sg8+?
      • 1...Kf5
        • 2.Se7#
        • 2.Rf6#
        • 2.Qg6#
      • 1...Kxd7!
    • 1.Qc6+?
      • 1...Rd6
        • 2.Qe4#
      • 1...Kf5!
    • 1.Qg4+?
      • 1...Sf5
        • 2.Qg8#
      • 1...Rxg4!
    • 1.Qg5?
      • threat
        • 2.Qe5#
      • 1...Re4
        • 2.Qd5#
        • 2.d8S#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Sf5
        • 2.Qg8#
      • 1...Rd6!
    • 1.d8S+?
      • 1...Kf5
        • 2.Qg6#
      • 1...Rxd8+!
  • Keys
    • 1.Bf4!
      • 1...Kf5
        • 2.Qg4#
      • 1...Rxf4
        • 2.Qd5#
      • 1...Rxd7
        • 2.Qe4#
      • 1...Rd1
        • 2.Qe4#
      • 1...Rd2
        • 2.Qe4#
      • 1...Rd3
        • 2.Qe4#
      • 1...Ra4
        • 2.Qd5#
      • 1...Rb4
        • 2.Qd5#
      • 1...Rc4
        • 2.Qd5#
      • 1...Re4
        • 2.Qxe4#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Rd6
        • 2.Qe4#
      • 1...Sf5
        • 2.Qg8#
      • 1...Sh5
        • 2.Qh3#
        • 2.Qg4#
      • 1...Se8
        • 2.Qh3#
        • 2.Qg4#

This anticipates 50031(1868)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD::QAR2(B)
    • R(a);N_GUARD::QAB1(B)
    • R(a);N_GUARD::QAR2(B),XR(a)
    • R(a);N_GUARD,P_PINS(C)::QAB1(B)
    • R(a);N_GUARD::QAB1(B),XR(a)
    • R(a);N_GUARD,XP(F)::QAR2(B)
    • S(c);OGATE,SBLOCK::QAB(B)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);S_FLIGHT::S(C)
      • Refutation
        • K(b);S_FLIGHT,XP(F)
    • Try
      • S(C);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(F)
    • Try
      • S(C);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(F)
    • Try
      • S(C);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(F)
    • Try
      • S(C);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(F)
    • Try
      • S(C);CHECK
      • Refutation
        • K(b);S_FLIGHT,XP(F)
    • Try
      • Q(B);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR2(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • S(c);OGATE,P_SPINS(c),SBLOCK::QAB(B)
      • Refutation
        • R(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • R(a);N_GUARD::QAB1(B),XR(a)
        • S(c);OGATE,SBLOCK::QAB(B)
      • Refutation
        • R(a);
    • Try
      • P(F);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
      • Refutation
        • R(a);CHECK,XS(F)
  • Actual
    • B(E);
    • Vars
      • K(b);S_FLIGHT::QAB1(B)
      • R(a);N_GUARD,P_PINS(C),XB(E)::QAB1(B)
      • R(a);N_GUARD,XP(F)::QAR2(B)
      • R(a);N_GUARD::QAR2(B)
      • R(a);N_GUARD::QAB1(B)
      • R(a);N_GUARD::QAR2(B),XR(a)
      • R(a);N_GUARD::QAB1(B),XR(a)
      • S(c);OGATE,SBLOCK::QAB(B)
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