MESON Chess Problem Database

Problem Display
PID: 17947 (nQr5/3p4/1npp4/4p3/4B1p1/R5N1/p2kP1K1/B6R w - - 0 1)

Stocchi, Ottavio

1/2 Prize, El Ajedrez Espanol, 1952

nQr5/3p4/1npp4/4p3/4B1p1/R5N1/p2kP1K1/B6R

#2

8 + 10

3174 The Two-move Chess Problem Tradition and Development 1966
6230 Ajedrez Artistico 1968
273 Mat Plus 1994
5407 Selected Stocchi (II) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.Qxd6#
    • 1...Sc4
      • 2.Qb4#
    • 1...Sd5
      • 2.Qb2#
  • Tries
    • 1.Kf2?
      • threat
        • 2.Bc3#
        • 2.Rxa2#
      • 1...Sa4
        • 2.Qxd6#
      • 1...Sc4
        • 2.Bc3#
        • 2.Qb4#
      • 1...Sd5
        • 2.Rxa2#
        • 2.Qb2#
      • 1...Rf8+!
    • 1.Bd4?
      • threat
        • 2.Be3#
        • 2.Rxa2#
      • 1...a1Q
        • 2.Be3#
      • 1...a1S
        • 2.Be3#
      • 1...a1B
        • 2.Be3#
      • 1...a1R
        • 2.Be3#
      • 1...Sa4
        • 2.Be3#
      • 1...Sc4
        • 2.Qb4#
      • 1...Sd5
        • 2.Rxa2#
        • 2.Qb2#
      • 1...exd4!
    • 1.Rf3?
      • threat
        • 2.Bc3#
      • 1...Sa4
        • 2.Qxd6#
      • 1...Sd5
        • 2.Qb2#
      • 1...gxf3+!
    • 1.Qxb6?
      • threat
        • 2.Bc3#
        • 2.Rxa2#
        • 2.Qe3#
        • 2.Qa5#
        • 2.Qb2#
        • 2.Qb4#
      • 1...Rb8
        • 2.Bc3#
        • 2.Rxa2#
        • 2.Qe3#
      • 1...c5
        • 2.Qa5#
        • 2.Qb2#
        • 2.Qxd6#
      • 1...Sxb6!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qa5#
      • 1...Sa4
        • 2.Qe3#
      • 1...Sc4
        • 2.Bc3#
      • 1...Sd5
        • 2.Rxa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::QAR(H),XP(g)
    • S(e);OGATE::QAB(H)
    • S(e);OGATE::QAR2(H)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • S(e);N_GUARD::QAR(H),XP(g)
      • Refutation
        • R(j);CHECK
    • Try
      • B(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::B(A)
        • S(e);::B(A)
        • S(e);OGATE::QAB(H)
      • Refutation
        • P(d);XB(A)
    • Try
      • R(E);
      • Threat
        • B(A)
      • Vars
        • S(e);N_GUARD::QAR(H),XP(g)
        • S(e);OGATE::QAR2(H)
      • Refutation
        • P(c);CHECK,XR(E)
    • Try
      • Q(H);XS(e)
      • Threat
        • DUALS(6)
      • Refutation
        • S(i);XQ(H)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)
    • Vars
      • S(e);OGATE::QAB1(H)
      • S(e);::B(A)
      • S(e);::R(E),XP(a)
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