MESON Chess Problem Database

Problem Display
PID: 72133 (4N3/4R3/b2qrbN1/3p1p2/2n1kpnr/2pRP2p/8/4KQ2 w - - 0 1)

Casa, Alex

Chess, 1952

4N3/4R3/b2qrbN1/3p1p2/2n1kpnr/2pRP2p/8/4KQ2

#2

7 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Sxd6#
    • 1...Sd2
      • 2.Sxd6#
    • 1...Sa3
      • 2.Sxd6#
    • 1...Scxe3
      • 2.Sxd6#
    • 1...Sa5
      • 2.Sxd6#
    • 1...Sb6
      • 2.Sxd6#
    • 1...Sh2
      • 2.Sxf6#
    • 1...Sgxe3
      • 2.Sxf6#
    • 1...Sh6
      • 2.Sxf6#
  • Tries
    • 1.Rd4+?
      • 1...Kxe3
        • 2.Qd3#
      • 1...Bxd4!
  • Keys
    • 1.Ke2!
      • threat
        • 2.Qf3#
      • 1...f3+
        • 2.Qxf3#
      • 1...Sd2
        • 2.Sxd6#
      • 1...Sce5
        • 2.Qxf4#
      • 1...Sf2
        • 2.Sxf6#
      • 1...Sh2
        • 2.Sxf6#
      • 1...Sge5
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • S(c);N_GUARD::S(G),XQ(k)
    • S(c);N_GUARD,XP(D)::S(G),XQ(k)
    • S(f);N_GUARD::S(G),XB(m)
    • S(f);N_GUARD,XP(D)::S(G),XB(m)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(D)::QAR1(B)
      • Refutation
        • B(m);XR(C)
  • Actual
    • K(A);P-FLIGHT
    • Threat
      • QAB1(B)
    • Vars
      • P(e);CHECK::QAB1(B),XP(e)
      • S(c);N_GUARD,P_PINR(C)::S(G),XQ(k)
      • S(c);N_SPINR(l),P_PINR(C),S_CUTQ(k)::QAR1(B),XP(e)
      • S(f);N_GUARD::S(G),XB(m)
      • S(f);N_SPINR(l),S_CUTB(m)::R1(C)
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