MESON Chess Problem Database

Problem Display
PID: 206787 (8/1p4Kb/1R6/6R1/1pk2N2/1Np3r1/P1B3r1/2b5 w - - 0 1)

Swan, John P

1st Prize, Michigan State Ty., 1870

8/1p4Kb/1R6/6R1/1pk2N2/1Np3r1/P1B3r1/2b5

#2

7 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bg6
      • 2.Rc5#
  • Tries
    • 1.Bg6?
      • threat
        • 2.Bf7#
        • 2.Rc5#
      • 1...Rxa2
        • 2.Bf7#
      • 1...Bxf4
        • 2.Rc5#
      • 1...Bxg6
        • 2.Rc5#
      • 1...c2
        • 2.Rc5#
      • 1...Be3
        • 2.Bf7#
      • 1...Rd2
        • 2.Rc5#
      • 1...Re2
        • 2.Rc5#
      • 1...Rd3
        • 2.Rc5#
      • 1...Re3
        • 2.Rc5#
      • 1...Bg8
        • 2.Rc5#
      • 1...Rxg5!
  • Keys
    • 1.Rbg6!
      • threat
        • 2.Rc5#
      • 1...Rxg5
        • 2.Bd3#
      • 1...Be3
        • 2.Bd3#
      • 1...b6
        • 2.Rc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(h);N_PINR(E)::R1(E)
  • Tries
    • Try
      • B(B);N_SPINR(E)
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XP(A)::B(B)
        • B(a);XS(D)::R1(E)
        • B(h);XB(B)::R1(E)
        • P(c);::R1(E)
        • B(a);::B(B)
        • R(b);::R1(E)
        • R(d);::R1(E)
        • B(h);::R1(E)
      • Refutation
        • R(d);P_PINB(B),XR(E)
  • Actual
    • R(F);N_SPINR(E)
    • Threat
      • R1(E)
    • Vars
      • R(d);N_GUARD,P_PINR(F),XR(E)::B(B)
      • B(a);S_CUTR(d)::B(B)
      • P(g);N_GUARD::R(F)
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