MESON Chess Problem Database

Problem Display
PID: 87791 (1b6/5B1b/1p3Q2/r3N1Pp/2P1k3/p2RNp2/2K2p2/1n5n w - - 0 1)

Shanshin, Valery Yurevich

Uralski Problemist, 1999

1b6/5B1b/1p3Q2/r3N1Pp/2P1k3/p2RNp2/2K2p2/1n5n

#2

8 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Bd5#
    • 1...Rd5
      • 2.Bxd5#
    • 1...Ra6
      • 2.Bd5#
    • 1...Ra7
      • 2.Bd5#
    • 1...Ra8
      • 2.Bd5#
    • 1...Bf5
      • 2.Qxf5#
    • 1...Bg6
      • 2.Bxg6#
    • 1...Bg8
      • 2.Bg6#
      • 2.Qf5#
    • 1...b5
      • 2.Bd5#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Qf4#
      • 1...Rxd5
        • 2.Bxd5#
      • 1...Bxe5
        • 2.Qxf3#
      • 1...Bf5!
    • 1.g6?
      • threat
        • 2.Qf5#
      • 1...Rxe5
        • 2.Qh4#
      • 1...Bxg6
        • 2.Bxg6#
      • 1...Sg3!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Qd4#
      • 1...Rd5
        • 2.Bxd5#
      • 1...Re5
        • 2.Qf4#
      • 1...Be5
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(g);N_GUARD::B(H)
    • R(g);N_GUARD::B(H),XR(g)
    • B(j);N_GUARD::QAB1(G),XB(j)
    • B(j);N_GUARD::B(H),XB(j)
    • P(i);S_CUTR(g)::B(H)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(G)
      • Vars
        • R(g);OGATE,XS(C)::B(H),XR(g)
        • B(k);SBLOCK,XS(E)::QAB1(G),XP(e)
      • Refutation
        • B(j);
    • Try
      • P(F);
      • Threat
        • QAB1(G)
      • Vars
        • R(g);SBLOCK,XS(E)::QAR(G)
        • B(j);OGATE,XP(F)::B(H),XB(j)
      • Refutation
        • S(b);
  • Actual
    • S(E);
    • Threat
      • QAR1(G)
    • Vars
      • R(g);N_GUARD::B(H),XR(g)
      • R(g);S_CUTB(k)::QAR1(G)
      • B(k);S_CUTR(g)::QAB1(G)
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