MESON Chess Problem Database

Problem Display
PID: 4855 (5R2/8/2p3B1/3k1N2/4R3/1K2b3/8/7Q w - - 0 1)

Loyd, Sam

NY State Chess Association, 1892

5R2/8/2p3B1/3k1N2/4R3/1K2b3/8/7Q

#2

6 + 3

5206 Sam Loyd and His Chess Problems 1913
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Bc5
      • 2.Bf7#
      • 2.Re1#
      • 2.Re2#
      • 2.Re3#
      • 2.Re7#
      • 2.Ree8#
    • 1...c5
      • 2.Rxe3#
      • 2.Re7#
      • 2.Ree8#
  • Tries
    • 1.Rc4+?
      • 1...Ke5
        • 2.Qe4#
      • 1...Ke6!
    • 1.Rd4+?
      • 1...Ke5
        • 2.Qe4#
      • 1...Ke6
        • 2.Qe4#
      • 1...Kc5!
    • 1.Re6+?
      • 1...Kc5
        • 2.Qxc6#
      • 1...Kxe6!
    • 1.Rfe8?
      • threat
        • 2.Rc4#
        • 2.R4e5#
        • 2.R8e5#
      • 1...Bd4
        • 2.R4e5#
      • 1...Bf4
        • 2.Rc4#
        • 2.R4e5#
      • 1...c5
        • 2.Rxe3#
        • 2.Ra4#
        • 2.Rb4#
        • 2.Rc4#
        • 2.Rd4#
        • 2.Rf4#
        • 2.Rg4#
        • 2.Rh4#
        • 2.R4e5#
        • 2.R4e6#
        • 2.R4e7#
      • 1...Kc5!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Re5#
        • 2.Qe5#
      • 1...Kxe4
        • 2.Se7#
      • 1...Kc5
        • 2.Qa5#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Bf4
        • 2.Qd4#
      • 1...c5
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(A),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • R(F);
      • Threat
        • DUALS(3)
      • Vars
        • B(a);::QAB(A)+R(C),DCHECK
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);S_FLIGHT,XR(C)::B(E)+S(D)
      • K(b);P-FLIGHT::QAR2(A)
      • B(a);N_GUARD::QAR1(A),XB(a)
      • B(a);N_GUARD::QAR1(A)
      • P(c);OGATEB,SBLOCK::QAB(A)
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