MESON Chess Problem Database

Problem Display
PID: 32370 (3B3n/2p2R1b/4B3/4pN2/r4k2/p1P3pn/2KPQ1P1/2b2r2 w - - 0 1)

Cassinelli, A

De Problemist, 1928

3B3n/2p2R1b/4B3/4pN2/r4k2/p1P3pn/2KPQ1P1/2b2r2

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Qf3#
    • 1...Re1
      • 2.Qf3#
    • 1...Rg1
      • 2.Qf3#
    • 1...Rh1
      • 2.Qf3#
    • 1...Rf3
      • 2.Qxf3#
    • 1...Bxf5+
      • 2.Rxf5#
    • 1...Sf2
      • 2.Qf3#
    • 1...Sg6
      • 2.Sd4#
      • 2.Sh4#
      • 2.Sd6#
      • 2.Sh6#
      • 2.Sg7#
  • Tries
    • 1.Qxf1+?
      • 1...Ke4
        • 2.Sxg3#
        • 2.Qf3#
        • 2.d3#
      • 1...Kg4
        • 2.Qf3#
      • 1...Sf2!
    • 1.Qe4+?
      • 1...Kxe4
        • 2.Sxg3#
      • 1...Rxe4!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qh4#
      • 1...Bxf5+
        • 2.Qxf5#
      • 1...Ke4
        • 2.Sxg3#
      • 1...Sf2
        • 2.Qf3#
      • 1...Sg6
        • 2.Sd6#
      • 1...e4
        • 2.Bxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(b);N_GUARD::QAR1(C)
    • R(b);N_GUARD::QAR1(C),XR(b)
    • B(j);CHECK,OGATE,P_SPINB(j),XS(F)::R1(H),XB(j)
    • S(e);S_CUTR(b)::QAR1(C)
  • Tries
    • Try
      • Q(C);CHECK,XR(b)
      • Vars
        • K(g);P-FLIGHT::QAB1(C)
      • Refutation
        • S(e);P_SPINS(e)
    • Try
      • Q(C);CHECK,N_SPINS(F)
      • Vars
        • K(g);P-FLIGHT,XQ(C)::S(F),XP(d)
      • Refutation
        • R(f);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR2(C)
    • Vars
      • B(j);CHECK,OGATE,P_SPINB(j),XS(F)::QAR1(C),XB(j)
      • K(g);N_PINS(F),P-FLIGHT::S(F),XP(d)
      • S(e);S_CUTR(b)::QAR1(C)
      • S(k);N_PINS(F)::R(H)+S(F)
      • P(h);N_PINS(F),OGATEB,SBLOCK::B(I),XP(i)
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Developed and maintained by Brian Stephenson.
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