MESON Chess Problem Database

Problem Display
PID: 201372 (3Nb1N1/2r1Pp1n/5P1p/ppPk3r/B1pB2Pp/8/1P1R3P/1Q1K4 w - - 0 1)

Belli, Nicolo

L'Alfiere di Re, 1922

3Nb1N1/2r1Pp1n/5P1p/ppPk3r/B1pB2Pp/8/1P1R3P/1Q1K4

#2

13 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Bg1#
      • 2.Bf2#
      • 2.Be3#
    • 1...Rf5
      • 2.Qxf5#
    • 1...Rxc5
      • 2.Bc3#
    • 1...Rxe7
      • 2.Sxe7#
    • 1...Sg5
      • 2.Qf5#
    • 1...Sxf6
      • 2.Sxf6#
    • 1...c3
      • 2.Bb3#
  • Tries
    • 1.Bc2?
      • threat
        • 2.Be4#
      • 1...Rxc5
        • 2.Bc3#
      • 1...Rxe7
        • 2.Sxe7#
      • 1...Sxf6
        • 2.Sxf6#
      • 1...c3
        • 2.Bb3#
        • 2.Qa2#
      • 1...Re5
        • 2.Bg1#
        • 2.Bf2#
        • 2.Be3#
      • 1...Sg5!
    • 1.b4?
      • threat
        • 2.Ba1#
        • 2.Bb2#
        • 2.Bc3#
      • 1...cxb4 ep
        • 2.Bxb3#
      • 1...c3
        • 2.Bb3#
      • 1...axb4!
    • 1.gxh5?
      • threat
        • 2.Qf5#
      • 1...Rxc5
        • 2.Bc3#
      • 1...Rxe7
        • 2.Sxe7#
      • 1...c3
        • 2.Bb3#
      • 1...Bd7!
  • Keys
    • 1.Ke2!
      • threat
        • 2.Qh1#
      • 1...Re5+
        • 2.Be3#
      • 1...Rxe7+
        • 2.Sxe7#
      • 1...Rxc5
        • 2.Bc3#
      • 1...Sxf6
        • 2.Sxf6#
      • 1...c3
        • 2.Bb3#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Sg5
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(f);N_GUARD::QAR2(A),XR(f)
    • R(h);SBLOCK,XP(I)::R(D)+B(G)
    • R(h);XP(K)::S(M),XR(h)
    • S(j);S_CUTR(f)::QAR2(A)
    • S(j);XP(J)::S(M),XS(j)
    • P(a);OGATEB::B(F)
  • Tries
    • Try
      • B(F);
      • Threat
        • B(F)
      • Vars
        • R(h);SBLOCK,XP(I)::R(D)+B(G)
        • R(h);XP(K)::S(M),XR(h)
        • S(j);XP(J)::S(M),XS(j)
      • Refutation
        • S(j);
    • Try
      • P(C);
      • Threat
        • DUALS(3)
      • Vars
        • P(a);EP,OGATEB,XP(C)::B(F),XP(a)
        • P(a);OGATEB::B(F)
      • Refutation
        • P(c);XP(C)
    • Try
      • P(H);XR(f)
      • Threat
        • QAR2(A)
      • Vars
        • R(h);SBLOCK,XP(I)::R(D)+B(G)
        • R(h);XP(K)::S(M),XR(h)
        • P(a);OGATEB::B(F)
      • Refutation
        • B(k);
  • Actual
    • K(B);S_FLIGHT
    • Threat
      • QAB(A)
    • Vars
      • R(f);CHECK,SBLOCK::R(D)+B(G)
      • R(h);CHECK,XP(K)::S(M),XR(h)
      • R(h);SBLOCK,XP(I)::R(D)+B(G)
      • S(j);XP(J)::S(M),XS(j)
      • P(a);OGATEB::B(F)
      • R(f);N_GUARD::QAR2(A),XR(f)
      • S(j);S_CUTR(f)::QAR2(A)
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