MESON Chess Problem Database

Problem Display
PID: 189496 (8/2K5/2p1p3/nkN1R3/3pBp2/n2p1P2/PN1B4/8 w - - 0 1)

Pickering, GE

Reading Standard, 1911

8/2K5/2p1p3/nkN1R3/3pBp2/n2p1P2/PN1B4/8

#2

8 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.a4#
    • 1...Sc2
      • 2.a4#
    • 1...S3c4
      • 2.a4#
    • 1...Sb3
      • 2.Bxc6#
    • 1...S5c4
      • 2.Bxc6#
    • 1...Sb7
      • 2.Bxc6#
  • Tries
    • 1.Sb3+?
      • 1...Ka6
        • 2.Rxa5#
      • 1...c5!
    • 1.Scxd3+?
      • 1...Ka6
        • 2.Rxa5#
      • 1...c5!
    • 1.Sca4+?
      • 1...Ka6
        • 2.Rxa5#
      • 1...c5!
    • 1.Sa6+?
      • 1...Kxa6
        • 2.Rxa5#
      • 1...c5!
    • 1.Sxe6+?
      • 1...Ka6
        • 2.Rxa5#
      • 1...c5!
    • 1.Sb7+?
      • 1...Ka6
        • 2.Rxa5#
      • 1...c5!
    • 1.Sd7+?
      • 1...Ka6
        • 2.Rxa5#
      • 1...c5!
    • 1.Be1?
      • 1...Sb1
        • 2.a4#
      • 1...Sc2
        • 2.a4#
      • 1...S3c4
        • 2.a4#
      • 1...Sb3
        • 2.Bxc6#
      • 1...S5c4
        • 2.Bxc6#
      • 1...Sb7
        • 2.Bxc6#
      • 1...d2!
    • 1.Bxd3+?
      • 1...S3c4
        • 2.a4#
      • 1...S5c4!
    • 1.Rg5?
      • 1...Sb1
        • 2.a4#
      • 1...Sc2
        • 2.a4#
      • 1...S3c4
        • 2.a4#
      • 1...Sb3
        • 2.Bxc6#
      • 1...S5c4
        • 2.Bxc6#
      • 1...Sb7
        • 2.Bxc6#
      • 1...e5!
    • 1.Rh5?
      • 1...Sb1
        • 2.a4#
      • 1...Sc2
        • 2.a4#
      • 1...S3c4
        • 2.a4#
      • 1...Sb3
        • 2.Bxc6#
      • 1...S5c4
        • 2.Bxc6#
      • 1...Sb7
        • 2.Bxc6#
      • 1...e5!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sxa3#
        • 2.Sd6#
      • 1...Kxc4
        • 2.Bxd3#
      • 1...S3xc4
        • 2.a4#
      • 1...S5xc4
        • 2.Bxc6#
      • 1...Sb1
        • 2.Sd6#
      • 1...Sc2
        • 2.Sd6#
      • 1...Sb7
        • 2.Sxa3#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(a);OGATE::P(A)
    • S(e);N_GUARD::B(E),XP(g)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(f);OGATE,S_FLIGHT::R1(G),XS(e)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • S(F);CHECK,XP(b)
      • Vars
        • K(f);OGATE,S_FLIGHT::R1(G),XS(e)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • S(F);CHECK
      • Vars
        • K(f);OGATE,S_FLIGHT::R1(G),XS(e)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • S(F);CHECK
      • Vars
        • K(f);OGATE,S_FLIGHT,XS(F)::R1(G),XS(e)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • S(F);CHECK,XP(h)
      • Vars
        • K(f);OGATE,S_FLIGHT::R1(G),XS(e)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • S(F);CHECK
      • Vars
        • K(f);OGATE,S_FLIGHT::R1(G),XS(e)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • S(F);CHECK
      • Vars
        • K(f);OGATE,S_FLIGHT::R1(G),XS(e)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • B(C);
      • Vars
        • S(a);OGATE::P(A)
        • S(e);N_GUARD::B(E),XP(g)
      • Refutation
        • P(b);
    • Try
      • B(E);CHECK,XP(b)
      • Vars
        • S(a);OGATE,P_SPINS(a)::P(A)
      • Refutation
        • S(e);P_SPINS(e)
    • Try
      • R(G);
      • Vars
        • S(a);OGATE::P(A)
        • S(e);N_GUARD::B(E),XP(g)
      • Refutation
        • P(h);
    • Try
      • R(G);
      • Vars
        • S(a);OGATE::P(A)
        • S(e);N_GUARD::B(E),XP(g)
      • Refutation
        • P(h);
  • Actual
    • S(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(f);OGATEB,S_FLIGHT,XS(B)::B(E),XP(b)
      • S(a);OGATE,SBLOCK,XS(B)::P(A)
      • S(e);N_GUARD,SBLOCK,XS(B)::B(E),XP(g)
      • S(a);::S(B)
      • S(e);::S(B),XS(a)
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