MESON Chess Problem Database

Problem Display
PID: 234043 (4K3/3N2p1/b1p1BbPQ/r5Rr/1n2k1P1/4P3/2PPP3/8 w - - 0 1)

Piatesi, Antonio

Il Due Mosse, 1958

4K3/3N2p1/b1p1BbPQ/r5Rr/1n2k1P1/4P3/2PPP3/8

#2

11 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sc5#
    • 1...Ra2
      • 2.Sc5#
    • 1...Ra3
      • 2.Sc5#
    • 1...Ra4
      • 2.Sc5#
    • 1...Rc5
      • 2.Sxc5#
    • 1...Rh1
      • 2.Qxh1#
    • 1...Rxg5
      • 2.Qh1#
    • 1...Bb5
      • 2.Sc5#
    • 1...Sd5
      • 2.Bf5#
    • 1...gxh6
      • 2.Sxf6#
  • Tries
    • 1.Re5+?
      • 1...Raxe5
        • 2.Qf4#
      • 1...Rhxe5
        • 2.Qf4#
        • 2.Qh1#
      • 1...Bxe5!
  • Keys
    • 1.Rb5!
      • threat
        • 2.Qf4#
      • 1...Rxh6
        • 2.Bf5#
      • 1...gxh6
        • 2.Sxf6#
      • 1...Rf5
        • 2.Bxf5#
      • 1...Rg5
        • 2.Qh1#
      • 1...Be5
        • 2.Sc5#
      • 1...Bg5
        • 2.Bf5#
      • 1...Sd3
        • 2.cxd3#
      • 1...Sd5
        • 2.d3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • R(c);N_GUARD::S(J)
    • R(c);N_GUARD::S(J),XR(c)
    • R(d);OGATE::QAB(I),XR(d)
    • R(d);OGATE,XR(F)::QAB(I)
    • B(e);S_CUTR(c)::S(J)
    • S(a);SBLOCK,S_CUTR(c)::B(G)
    • P(h);N_GUARD,XQ(I)::S(J),XB(g)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • R(c);P_PINB(G),XR(F)::QAR1(I)
      • Refutation
        • B(g);XR(F)
  • Actual
    • R(F);
    • Threat
      • QAR1(I)
    • Vars
      • R(d);N_GUARD,XQ(I)::B(G)
      • P(h);N_GUARD,XQ(I)::S(J),XB(g)
      • R(d);N_GUARD::B(G),XR(d)
      • R(d);OGATE::QAB(I)
      • B(g);SBLOCK,S_CUTR(d)::S(J)
      • B(g);S_CUTR(d)::B(G)
      • S(a);OGATE::P(A),XS(a)
      • S(a);N_GUARD::P(B)
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