MESON Chess Problem Database

Problem Display
PID: 198675 (B4N2/8/2r3pK/2Pk1p2/N4Q1R/5P2/b1Pq4/1rbRn3 w - - 0 1)

Guidelli, Giorgio

Mari, Alberto

4th Prize, L'Italia Scacchistica, 1921

B4N2/8/2r3pK/2Pk1p2/N4Q1R/5P2/b1Pq4/1rbRn3

#2

10 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Rxd4#
    • 1...Rb3
      • 2.c4#
    • 1...g5+
      • 2.Qd6#
  • Tries
    • 1.Kh7?
      • threat
        • 2.Qd6#
      • 1...Qd4
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Rb7+!
    • 1.Rxd2+?
      • 1...Sd3
        • 2.Rxd3#
        • 2.Qd6#
        • 2.Qd4#
      • 1...Bxd2!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Sc3#
      • 1...g5+
        • 2.Qe6#
      • 1...Qd4
        • 2.Rdxd4#
        • 2.Rhxd4#
      • 1...f4
        • 2.Qe4#
      • 1...Rb3
        • 2.c4#
      • 1...Bb2
        • 2.Sb6#
      • 1...Sd3
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(e);OGATE::R1(A),XQ(e)
    • R(a);S_CUTB(d)::P(B)
    • P(i);CHECK,N_PINQ(E)::QAR1(E)
  • Tries
    • Try
      • K(H);N_SPINQ(E),P-FLIGHT
      • Threat
        • QAR1(E)
      • Refutation
        • R(a);CHECK,N_SPINR(h)
    • Try
      • R(A);CHECK,N_SPINQ(E),XQ(e)
      • Refutation
        • B(b);P_PINQ(E),XR(A)
  • Actual
    • Q(E);
    • Threat
      • S(D)
    • Vars
      • P(i);CHECK,N_PINQ(E)::QAB1(E)
      • P(g);N_PINQ(E)::QAB1(E)
      • R(a);S_CUTB(d)::P(B)
      • B(b);S_CUTR(a)::S(D)
      • S(c);N_SPINQ(e),S_CUTQ(e)::R1(F)
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