MESON Chess Problem Database

Problem Display
PID: 103940 (4rqb1/N7/2pp4/Rp1k4/1r1P2Q1/2KPR3/2B5/3N4 w - - 0 1)

Cristiani, Matei

Vita Postelegrafonica, 1927-1929

4rqb1/N7/2pp4/Rp1k4/1r1P2Q1/2KPR3/2B5/3N4

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3+
      • 2.Bxb3#
    • 1...Rc4+
      • 2.dxc4#
    • 1...Rxd4
      • 2.Qxd4#
    • 1...Rxe3
      • 2.Sxe3#
    • 1...Re4
      • 2.Qxe4#
      • 2.dxe4#
    • 1...Ra8
      • 2.Qe4#
    • 1...Rb8
      • 2.Qe4#
    • 1...Rc8
      • 2.Qe4#
    • 1...Rd8
      • 2.Qe4#
    • 1...Be6
      • 2.Qe4#
  • Tries
    • 1.Sc8?
      • threat
        • 2.Sb6#
      • 1...Rb3+
        • 2.Bxb3#
      • 1...Rc4+
        • 2.dxc4#
      • 1...Rxd4
        • 2.Qxd4#
      • 1...Rxc8
        • 2.Qe4#
      • 1...c5!
    • 1.Bb3+?
      • 1...Rc4+
        • 2.Bxc4#
        • 2.dxc4#
      • 1...Rxb3+!
    • 1.Qf3+?
      • 1...Re4
        • 2.Qxe4#
      • 1...Qxf3!
    • 1.Qg2+?
      • 1...Re4
        • 2.Qxe4#
      • 1...Qf3!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxc6#
      • 1...Rb3+
        • 2.Bxb3#
      • 1...Rc4+
        • 2.dxc4#
      • 1...Rxe3
        • 2.Sxe3#
      • 1...Re4
        • 2.dxe4#
      • 1...Re5
        • 2.Rxe5#
      • 1...Rc8
        • 2.Re5#
      • 1...c5
        • 2.Qc6#
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(a);CHECK,N_GUARD::B(B),XR(a)
    • R(a);CHECK,OGATE::P(D),XR(a)
    • R(a);OGATE,XP(F)::QAR1(G),XR(a)
    • R(f);P_PINP(D),XR(E)::S(A),XR(f)
    • R(f);N_GUARD::QAB1(G)
    • B(h);S_CUTR(f)::QAB1(G)
  • Tries
    • Try
      • S(I);
      • Threat
        • S(I)
      • Vars
        • R(a);CHECK,N_GUARD::B(B),XR(a)
        • R(a);CHECK,OGATE::P(D),XR(a)
        • R(a);OGATE,XP(F)::QAR1(G),XR(a)
        • R(f);N_GUARD,XS(I)::QAB1(G)
      • Refutation
        • P(d);N_SPINP(b)
    • Try
      • B(B);CHECK
      • Refutation
        • R(a);CHECK,XB(B)
    • Try
      • Q(G);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAB1(G),XR(f)
      • Refutation
        • Q(g);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAB1(G),XR(f)
      • Refutation
        • Q(g);P_SPINQ(g)
  • Actual
    • Q(G);
    • Threat
      • QAB1(G),XP(d)
    • Vars
      • R(a);CHECK,N_GUARD::B(B),XR(a)
      • R(a);CHECK,OGATE::P(D),XR(a)
      • R(f);P_PINP(D),XR(E)::S(A),XR(f)
      • R(f);OGATE::P(D),XR(f)
      • R(f);N_GUARD::R1(E),XR(f)
      • R(f);N_GUARD::R1(E)
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