MESON Chess Problem Database

Problem Display
PID: 110560 (bB3Q2/8/N3B1p1/1R2P1p1/2K1k1n1/b1ppP1R1/2N4n/7q w - - 0 1)

Podushkin, S

Banyai MT, 1969

bB3Q2/8/N3B1p1/1R2P1p1/2K1k1n1/b1ppP1R1/2N4n/7q

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Sc5#
    • 1...Bb2
      • 2.Sc5#
    • 1...Bc5
      • 2.Sxc5#
    • 1...Bd5+
      • 2.Bxd5#
    • 1...Sf1
      • 2.Rxg4#
    • 1...Sf3
      • 2.Rxg4#
    • 1...Sxe3+
      • 2.Rxe3#
    • 1...Sxe5+
      • 2.Rxe5#
  • Tries
    • 1.Rd5?
      • threat
        • 2.Rd4#
      • 1...Bxd5+
        • 2.Bxd5#
      • 1...Sxe3+
        • 2.Rxe3#
      • 1...Sxe5+
        • 2.Rxe5#
      • 1...Bc5
        • 2.Sxc5#
      • 1...Sf3
        • 2.Rxg4#
      • 1...Bd6!
    • 1.Qf3+?
      • 1...Sxf3
        • 2.Rxg4#
      • 1...Qxf3!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qd4#
      • 1...Bd5+
        • 2.Qxd5#
      • 1...Sxe3+
        • 2.Qxe3#
      • 1...Sxe5+
        • 2.Qxe5#
      • 1...Bxc5
        • 2.Sxc5#
      • 1...Sf3
        • 2.Rxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • B(c);N_GUARD::S(G)
    • B(c);N_GUARD::S(G),XB(c)
    • B(j);CHECK,N_GUARD::B(H),XB(j)
    • S(b);N_GUARD::R(C),XS(g)
    • S(g);CHECK,OGATE,XP(B)::R1(C),XS(g)
    • S(g);CHECK,OGATE,XP(F)::R1(E),XS(g)
  • Tries
    • Try
      • R(E);
      • Threat
        • R1(E)
      • Vars
        • B(j);CHECK,OGATE,XR(E)::B(H),XB(j)
        • S(g);CHECK,OGATE,XP(B)::R1(C),XS(g)
        • S(g);CHECK,OGATE,XP(F)::R1(E),XS(g)
        • B(c);N_GUARD::S(G),XB(c)
        • S(b);N_GUARD::R(C),XS(g)
      • Refutation
        • B(c);
    • Try
      • Q(J);CHECK
      • Vars
        • S(b);SBLOCK,XQ(J)::R(C),XS(g)
      • Refutation
        • Q(a);XQ(J)
  • Actual
    • Q(J);
    • Threat
      • QAR1(J)
    • Vars
      • B(j);CHECK,N_GUARD::QAB1(J),XB(j)
      • S(g);CHECK,OGATE,XP(B)::QAR1(J),XS(g)
      • S(g);CHECK,OGATE,XP(F)::QAR1(J),XS(g)
      • B(c);XQ(J)::S(G),XB(c)
      • S(b);N_GUARD,SBLOCK::R(C),XS(g)
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