MESON Chess Problem Database

Problem Display
PID: 250250 (5r2/3N4/p2p4/q1pR3Q/r3k2n/6P1/3p1B2/1N1K4 w - - 0 1)

Cassinelli, A

Magyar Sakkvilag, 1927

5r2/3N4/p2p4/q1pR3Q/r3k2n/6P1/3p1B2/1N1K4

#2

7 + 9

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Sxc3#
    • 1...Qb6
      • 2.Sxd2#
      • 2.Sc3#
    • 1...Qc7
      • 2.Sxd2#
      • 2.Sc3#
    • 1...Qd8
      • 2.Sxd2#
      • 2.Sc3#
    • 1...Qb5
      • 2.Sxd2#
      • 2.Sc3#
    • 1...Rb4
      • 2.Sxd2#
      • 2.Sc3#
    • 1...Rf6
      • 2.Sxf6#
    • 1...Ra8
      • 2.Sf6#
    • 1...Rb8
      • 2.Sf6#
    • 1...Rc8
      • 2.Sf6#
    • 1...Rd8
      • 2.Sf6#
    • 1...Re8
      • 2.Sf6#
    • 1...Rg8
      • 2.Sf6#
    • 1...Rh8
      • 2.Sf6#
    • 1...Sf5
      • 2.Qh1#
    • 1...c4
      • 2.Rd4#
  • Tries
    • 1.Sxc5+?
      • 1...Qxc5
        • 2.Sxd2#
      • 1...dxc5!
    • 1.Re5+?
      • 1...Kd3
        • 2.Qe2#
      • 1...dxe5!
    • 1.Qg4+?
      • 1...Rf4
        • 2.Sf6#
      • 1...Kxd5!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Qd5#
      • 1...Kxd3
        • 2.Qe2#
      • 1...Rd4
        • 2.Re3#
      • 1...Rf5
        • 2.Qe2#
      • 1...Sf5
        • 2.Qf3#
      • 1...c4
        • 2.Rd4#
      • 1...d5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(e);N_GUARD::S(A),XQ(e)
    • R(i);N_GUARD::S(G),XR(i)
    • R(i);N_GUARD::S(G)
    • S(d);OGATE::QAB(F)
    • P(f);N_GUARD,S_CUTR(b)::R1(E)
  • Tries
    • Try
      • S(G);CHECK,XP(f)
      • Vars
        • Q(e);XS(G)::S(A),XP(a)
      • Refutation
        • P(h);XS(G)
    • Try
      • R(E);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(F)
      • Refutation
        • P(h);XR(E)
    • Try
      • Q(F);CHECK
      • Vars
        • R(i);P_SPINR(i)::S(G)
      • Refutation
        • K(c);S_FLIGHT,XR(E)
  • Actual
    • R(E);
    • Threat
      • QAB1(F)
    • Vars
      • K(c);N_GUARD,S_FLIGHT,XR(E)::QAB1(F)
      • R(b);SBLOCK::R1(E)
      • R(i);SBLOCK::QAR2(F)
      • S(d);N_GUARD,S_CUTR(i)::QAB1(F)
      • P(f);N_GUARD,S_CUTR(b)::R1(E)
      • P(h);::QAB1(F),XP(h)
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