MESON Chess Problem Database

Problem Display
PID: 201393 (1rn5/RNN2Qp1/1pk1rb1q/5Rp1/P2pb3/nK3B1p/8/8 w - - 0 1)

Corrias, Antonio G

L'Alfiere di Re, 1922

1rn5/RNN2Qp1/1pk1rb1q/5Rp1/P2pb3/nK3B1p/8/8

#2

8 + 13

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5+
      • 2.Bxd5#
    • 1...Be5
      • 2.Bxe4#
    • 1...Sb5
      • 2.axb5#
  • Tries
    • 1.Sa5+?
      • 1...Kd6
        • 2.Qxe6#
      • 1...bxa5+!
    • 1.Sd8+?
      • 1...Kd6
        • 2.Qxe6#
      • 1...Bxd8!
    • 1.Qxe6+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...Kxc7!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Qc7#
      • 1...Bd5+
        • 2.Bxd5#
      • 1...Rxb7
        • 2.Qxb7#
      • 1...Sxb5
        • 2.axb5#
      • 1...Re7
        • 2.Sd8#
      • 1...Be5
        • 2.Bxe4#
      • 1...Be7
        • 2.Qe8#
      • 1...Se7
        • 2.Qxe6#
      • 1...Re5
        • 2.Sxd4#
      • 1...Bd8
        • 2.Sxd4#
        • 2.Sxd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(d);CHECK,OGATE::B(B),XB(d)
    • B(i);S_CUTR(h)::B(B),XB(d)
    • S(a);OGATE::P(C),XS(a)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(g);N_SPINB(d),P-FLIGHT::QAR1(H),XR(h)
      • Refutation
        • P(f);CHECK,XS(F)
    • Try
      • S(F);CHECK
      • Vars
        • K(g);N_SPINB(d),P-FLIGHT::QAR1(H),XR(h)
      • Refutation
        • B(i);XS(F)
    • Try
      • Q(H);CHECK,XR(h)
      • Vars
        • S(m);N_GUARD,P_SPINS(m)::QAR1(H),XS(m)
      • Refutation
        • K(g);N_SPINB(d),P-FLIGHT,XS(G)
  • Actual
    • S(G);
    • Threat
      • QAR1(H)
    • Vars
      • B(d);CHECK,OGATE::B(B),XB(d)
      • R(l);OGATE,XS(F)::QAB1(H),XR(l)
      • S(a);OGATE,XS(G)::P(C),XS(a)
      • R(h);S_CUTB(i)::S(F)
      • B(i);S_CUTR(h)::B(B),XB(d)
      • B(i);S_CUTR(h)::QAB(H)
      • S(m);N_GUARD::QAR2(H),XR(h)
      • R(h);S_CUTB(i)::S(G),XP(c)
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