MESON Chess Problem Database

Problem Display
PID: 17928 (8/1B6/8/N4p2/pR1P1pp1/B3kPP1/1n4P1/2bQ2K1 w - - 0 1)

Stocchi, Ottavio

American Chess Problemist, 1952

8/1B6/8/N4p2/pR1P1pp1/B3kPP1/1n4P1/2bQ2K1

#2

10 + 7

5407 Selected Stocchi (II) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Sxc4#
  • Tries
    • 1.Bxb2?
      • threat
        • 2.Sc4#
        • 2.Bxc1#
      • 1...Bxb2
        • 2.Sc4#
      • 1...fxg3
        • 2.Bxc1#
      • 1...Bd2!
    • 1.Rxb2?
      • threat
        • 2.Sc4#
        • 2.Re2#
      • 1...Bxb2
        • 2.Sc4#
      • 1...gxf3
        • 2.Sc4#
      • 1...Bd2
        • 2.Qxd2#
      • 1...fxg3!
    • 1.Rb3+?
      • 1...Sd3
        • 2.Rxd3#
        • 2.Qxd3#
      • 1...axb3!
  • Keys
    • 1.Ba6!
      • threat
        • 2.Qe2#
        • 2.Qxc1#
        • 2.Qe1#
      • 1...Sxd1
        • 2.Bxc1#
      • 1...fxg3
        • 2.Qxc1#
      • 1...gxf3
        • 2.Qe1#
      • 1...Bd2
        • 2.Qe2#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sc4
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::S(I),XS(b)
  • Tries
    • Try
      • B(D);XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XB(D)::S(I)
        • P(e);XP(F)::B(D),XB(a)
      • Refutation
        • B(a);
    • Try
      • R(G);XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XR(G)::S(I)
        • P(f);XP(E)::S(I)
        • B(a);N_GUARD::QAB1(A),XB(a)
      • Refutation
        • P(e);XP(F)
    • Try
      • R(G);CHECK
      • Refutation
        • P(d);XR(G)
  • Actual
    • B(J);
    • Threat
      • DUALS(3)
    • Vars
      • S(b);OGATE,XQ(A)::B(D),XB(a)
      • P(e);XP(F)::QAB(A),XB(a)
      • P(f);XP(E)::QAR2(A)
      • B(a);::QAR1(A)
      • S(b);N_GUARD::QAR1(A),XS(b)
      • S(b);N_GUARD::S(I),XS(b)
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