MESON Chess Problem Database

Problem Display
PID: 193772 (Qn5r/R2P4/p2k1P2/Np5P/1P3KB1/8/brP1p3/4B3 w - - 0 1)

Pasqualini, Giulio

L'Italia Scacchistica, 1916

Qn5r/R2P4/p2k1P2/Np5P/1P3KB1/8/brP1p3/4B3

#2

11 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb4+
      • 2.Bxb4#
    • 1...Rc8
      • 2.dxc8S#
    • 1...Re8
      • 2.dxe8S#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sxd7
      • 2.Rxd7#
      • 2.Qc6#
  • Tries
    • 1.Rxa6+?
      • 1...Sxa6
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Kc7!
    • 1.Qe4?
      • threat
        • 2.Qe5#
      • 1...Rxb4
        • 2.Bxb4#
      • 1...Sxd7
        • 2.Rxd7#
        • 2.Qc6#
      • 1...Re8
        • 2.dxe8S#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Rxh5!
    • 1.Qxb8+?
      • 1...Kd5
        • 2.Qe5#
      • 1...Rxb8!
    • 1.d8Q+?
      • 1...Sd7
        • 2.Rxa6#
        • 2.Rxd7#
        • 2.Qc6#
        • 2.Qc7#
        • 2.Qe7#
        • 2.Qxd7#
      • 1...Rxd8!
    • 1.d8R+?
      • 1...Sd7
        • 2.Raxd7#
        • 2.Rdxd7#
        • 2.Qc6#
      • 1...Rxd8!
  • Keys
    • 1.Ke4!
      • threat
        • 2.Bg3#
      • 1...Rxb4+
        • 2.Bxb4#
      • 1...Re8+
        • 2.dxe8S#
      • 1...Bd5+
        • 2.Qxd5#
      • 1...Rxh5
        • 2.Qxb8#
      • 1...Sxd7
        • 2.Rxd7#
        • 2.Qc6#
      • 1...Rb3
        • 2.Qd5#
      • 1...Sc6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(b);CHECK,OGATE,XP(C)::B(A),XR(b)
    • R(h);OGATE::PXR(h)=S
    • S(g);N_GUARD::QAR1(K),XS(g)
  • Tries
    • Try
      • R(I);CHECK,XP(e)
      • Vars
        • S(g);N_GUARD,XR(I)::QAR1(K)
        • S(g);N_GUARD,P_SPINS(g)::QAR1(K),XS(g)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(K);
      • Threat
        • QAB1(K)
      • Vars
        • R(b);OGATE,P_PINQ(K),XP(C)::B(A),XR(b)
        • R(h);OGATE::PXR(h)=S
        • S(g);N_GUARD::QAR1(K),XS(g)
      • Refutation
        • R(h);XP(G)
    • Try
      • Q(K);CHECK,XS(g)
      • Vars
        • K(f);OGATE,P-FLIGHT::QAR1(K)
      • Refutation
        • R(h);XQ(K)
    • Try
      • P(J);CHECK
      • Refutation
        • R(h);XQ(J)
    • Try
      • P(J);CHECK
      • Refutation
        • R(h);XR(J)
  • Actual
    • K(D);P-FLIGHT
    • Threat
      • B(A)
    • Vars
      • R(b);CHECK,OGATE,XP(C)::B(A),XR(b)
      • R(h);CHECK,OGATE::PXR(h)=S
      • B(a);CHECK,N_GUARD::QAR1(K),XB(a)
      • R(h);N_GUARD,XP(G)::QAB(K),XS(g)
      • R(b);S_CUTB(a)::QAR1(K)
      • S(g);N_GUARD::QAR1(K),XS(g)
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