MESON Chess Problem Database

Problem Display
PID: 67429 (2R2B1K/1p6/qP2Np2/br1k1P2/p4P2/1n1pR3/Q4nb1/8 w - - 0 1)

Stocchi, Ottavio

Magasinet, 1955

2R2B1K/1p6/qP2Np2/br1k1P2/p4P2/1n1pR3/Q4nb1/8

#2

9 + 11

5407 Selected Stocchi (II) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Rc5#
    • 1...Rc5
      • 2.Rxc5#
    • 1...Rxb6
      • 2.Rc5#
    • 1...Sd1
      • 2.Qxg2#
    • 1...Sh1
      • 2.Qxg2#
    • 1...Sh3
      • 2.Qxg2#
    • 1...Se4
      • 2.Rxd3#
    • 1...Sg4
      • 2.Qxg2#
  • Tries
    • 1.Rxd3+?
      • 1...Sxd3
        • 2.Qxg2#
      • 1...Ke4!
    • 1.Rd8+?
      • 1...Kc6
        • 2.Rd6#
      • 1...Kc4!
    • 1.Qxb3+?
      • 1...Rxb3
        • 2.Rc5#
      • 1...axb3!
  • Keys
    • 1.Qxa4!
      • threat
        • 2.Qc4#
      • 1...Rxb6
        • 2.Sc7#
      • 1...Rb4
        • 2.Qd7#
      • 1...Rc5
        • 2.Rd8#
      • 1...Bb4
        • 2.Qxb3#
      • 1...Sd2
        • 2.Qd4#
      • 1...Sc5
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(g);N_GUARD::R1(G)
    • R(g);N_GUARD::R1(G),XR(g)
    • R(g);N_GUARD,XP(E)::R1(G)
    • S(a);OGATE::QAB(A),XB(b)
    • S(a);N_GUARD,SBLOCK::R(B),XP(d)
  • Tries
    • Try
      • R(B);CHECK,XP(d)
      • Vars
        • S(a);OGATE,XR(B)::QAB(A),XB(b)
      • Refutation
        • K(h);N_SPINS(c),S_FLIGHT
    • Try
      • R(G);CHECK
      • Vars
        • K(h);N_SPINS(c),S_FLIGHT::R1(G)
      • Refutation
        • K(h);S_FLIGHT
    • Try
      • Q(A);CHECK,XS(c)
      • Vars
        • R(g);XQ(A)::R1(G)
      • Refutation
        • P(e);XQ(A)
  • Actual
    • Q(A);N_PINS(c),XP(e)
    • Threat
      • QAB1(A)
    • Vars
      • R(g);XP(E)::S(F)
      • R(g);OGATE::QAR2(A)
      • R(g);::R(G)
      • B(f);S_CUTR(g)::QAB(A),XS(c)
      • S(c);N_GUARD::QAR1(A)
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