MESON Chess Problem Database

Problem Display
PID: 79798 (4Q3/6b1/1K2p1P1/1p2k3/1r1RPR1P/5p2/2n1nN2/2q2b2 w - - 0 1)

Casa, Alex

The Problemist, 1952

4Q3/6b1/1K2p1P1/1p2k3/1r1RPR1P/5p2/2n1nN2/2q2b2

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd4
      • 2.Qb8#
  • Tries
    • 1.Qd8?
      • threat
        • 2.Sd3#
        • 2.Qd6#
      • 1...Kxf4
        • 2.Qg5#
      • 1...Qxf4
        • 2.Sd3#
      • 1...Scxd4
        • 2.Sd3#
      • 1...Sexd4
        • 2.Qc7#
        • 2.Qb8#
      • 1...Sxf4
        • 2.Sg4#
      • 1...Qd2
        • 2.Qd6#
      • 1...Qa3
        • 2.Qd6#
      • 1...Qe3
        • 2.Qd6#
      • 1...Qd1
        • 2.Qd6#
      • 1...Rb3
        • 2.Qd6#
      • 1...Bf8
        • 2.Sd3#
        • 2.Qf6#
      • 1...Se1
        • 2.Qd6#
      • 1...Sg1
        • 2.Qd6#
      • 1...Sc3
        • 2.Qd6#
      • 1...Sg3
        • 2.Qd6#
      • 1...Rxd4!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qd6#
      • 1...Kxd4
        • 2.Qc5#
      • 1...Kxf4
        • 2.Qg5#
      • 1...Qxf4
        • 2.Rd5#
      • 1...Rxd4
        • 2.Rf5#
      • 1...Scxd4
        • 2.Sd3#
      • 1...Sexd4
        • 2.Qc7#
      • 1...Sxf4
        • 2.Qxg7#
      • 1...Bf8
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(d);SBLOCK,XR(B)::QAB(H)
  • Tries
    • Try
      • Q(H);N_PINP(i)
      • Threat
        • DUALS(2)
      • Vars
        • K(h);S_FLIGHT,XR(D)::QAB1(H)
        • Q(a);XR(D)::S(A)
        • S(c);XR(B)::S(A)
        • S(d);SBLOCK,XR(D)::S(A)
        • Q(a);::QAB1(H)
        • Q(a);P_PINR(B)::QAB1(H)
        • R(f);::QAB1(H)
        • S(c);::QAB1(H)
        • S(d);::QAB1(H)
      • Refutation
        • R(f);XR(B)
  • Actual
    • Q(H);
    • Threat
      • QAB1(H)
    • Vars
      • K(h);N_SPINP(i),S_FLIGHT,XR(B)::QAB1(H)
      • K(h);N_SPINP(i),S_FLIGHT,XR(D)::QAB1(H)
      • Q(a);SBLOCK,XR(D)::R1(B)
      • R(f);SBLOCK,XR(B)::R1(D)
      • S(c);SBLOCK,XR(B)::S(A)
      • S(d);SBLOCK,XR(B)::QAB(H)
      • S(d);SBLOCK,XR(D)::QAB(H),XB(j)
      • B(j);N_GUARD::QAB1(H)
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