MESON Chess Problem Database

Problem Display
PID: 248186 (r7/1Q1R4/2p5/5p2/NnknN3/1R2p3/1Kp1Pp2/1br1bB2 w - - 0 1)

de Blasio, Francis JC

5th HM., Gross (Isidor) MT, 1950

r7/1Q1R4/2p5/5p2/NnknN3/1R2p3/1Kp1Pp2/1br1bB2

#2

8 + 12

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3+
      • 2.Rxc3#
    • 1...Sa2
      • 2.Sb6#
    • 1...Sd3+
      • 2.exd3#
    • 1...Sd5
      • 2.Sd6#
    • 1...Sa6
      • 2.Sb6#
    • 1...Sb5
      • 2.Sb6#
    • 1...c5
      • 2.Sd6#
  • Tries
    • 1.Sd2+?
      • 1...exd2
        • 2.Rc3#
        • 2.Rxb4#
        • 2.Qxb4#
      • 1...Bxd2!
    • 1.Qa6+?
      • 1...Sxa6
        • 2.Sb6#
      • 1...Sb5
        • 2.Sb6#
      • 1...Rxa6!
    • 1.Qxc6+?
      • 1...Sbxc6
        • 2.Sb6#
      • 1...Sdxc6!
    • 1.Qb5+?
      • 1...Sxb5
        • 2.Sb6#
      • 1...cxb5
        • 2.Sb6#
      • 1...Kxb5!
  • Keys
    • 1.Rd3!
      • threat
        • 2.R3xd4#
        • 2.R7xd4#
      • 1...Bc3+
        • 2.Rxc3#
      • 1...Sxd3+
        • 2.exd3#
      • 1...Sxe2
        • 2.R3d4#
      • 1...Rd1
        • 2.R7xd4#
      • 1...Rd8
        • 2.R3xd4#
      • 1...Sd5
        • 2.Sd6#
      • 1...Sb3
        • 2.Sd6#
      • 1...Sf3
        • 2.Sd6#
      • 1...Sb5
        • 2.Sb6#
      • 1...Se6
        • 2.Sd6#
      • 1...c5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • B(c);CHECK,N_GUARD::R1(D),XB(c)
    • S(g);::S(E)
    • S(g);CHECK,OGATE::P(C),XS(g)
    • S(g);SBLOCK::S(F)
    • S(i);SBLOCK::S(E)
    • P(k);::S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • B(c);XS(F)
    • Try
      • Q(G);CHECK
      • Vars
        • S(g);XQ(G)::S(E)
        • S(i);P_SPINS(i)::S(E)
      • Refutation
        • R(l);XQ(G)
    • Try
      • Q(G);CHECK,XP(k)
      • Vars
        • S(g);XQ(G)::S(E)
      • Refutation
        • S(i);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • S(i);SBLOCK,XQ(G)::S(E)
        • P(k);SBLOCK,XQ(G)::S(E)
      • Refutation
        • K(h);P_SPINS(g),S_FLIGHT,XQ(G)
  • Actual
    • R(D);
    • Threat
      • DUALS(2)
    • Vars
      • B(c);CHECK,N_GUARD::R1(D),XB(c)
      • S(g);CHECK,OGATE,XR(D)::P(C),XS(g)
      • S(i);XP(C)::R1(D)
      • R(b);::R1(H),XS(i)
      • R(l);::R1(D),XS(i)
      • S(g);SBLOCK::S(F)
      • S(i);::S(F)
      • S(i);SBLOCK::S(E)
      • P(k);::S(F)
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