MESON Chess Problem Database

Problem Display
PID: 136316 (3r1R2/2q5/b1p4R/2prkN2/5pP1/B4Pn1/B2Pp3/1nN1K1Q1 w - - 0 1)

Carvalho, G

L'Italia Scacchistica, 2002

3r1R2/2q5/b1p4R/2prkN2/5pP1/B4Pn1/B2Pp3/1nN1K1Q1

#2

11 + 11

6490 yacpdb 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd2
      • 2.Re6#
    • 1...Rd3
      • 2.Re6#
    • 1...Rd4
      • 2.Re6#
    • 1...R5d7
      • 2.Re6#
    • 1...Sxf5
      • 2.Rxf5#
  • Tries
    • 1.Sd3+?
      • 1...Rxd3
        • 2.Re6#
      • 1...Bxd3!
    • 1.Bb2+?
      • 1...Rd4
        • 2.Re6#
      • 1...Sc3!
    • 1.Re8+?
      • 1...Qe7
        • 2.Rxe7#
      • 1...Rxe8!
    • 1.Qe3+?
      • 1...Se4
        • 2.Qxe4#
      • 1...fxe3!
    • 1.Qd4+?
      • 1...Rxd4
        • 2.Re6#
      • 1...cxd4!
    • 1.d4+?
      • 1...Rxd4
        • 2.Re6#
      • 1...cxd4!
  • Keys
    • 1.Qxc5!
      • threat
        • 2.d4#
      • 1...Rxc5
        • 2.Re6#
      • 1...Sxd2
        • 2.Bb2#
      • 1...Sxf5
        • 2.Rxf5#
      • 1...Qa5
        • 2.Qe7#
      • 1...Bd3
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(f);XP(E)::R1(J)
    • R(f);::R1(J)
    • S(c);OGATE,XS(I)::R1(K),XS(c)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • R(f);XS(A)::R1(J)
      • Refutation
        • B(h);XS(A)
    • Try
      • B(F);CHECK
      • Vars
        • R(f);P_SPINR(f)::R1(J)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • R(K);CHECK
      • Vars
        • Q(j);N_GUARD,P_SPINQ(j)::R(K),XQ(j)
      • Refutation
        • R(k);XR(K)
    • Try
      • Q(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR1(C),XS(c)
      • Refutation
        • P(d);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • R(f);XQ(C)::R1(J)
      • Refutation
        • P(e);XQ(C)
    • Try
      • P(E);CHECK
      • Vars
        • R(f);XP(E)::R1(J)
      • Refutation
        • P(e);XP(E)
  • Actual
    • Q(C);P_PINR(f),XP(e)
    • Threat
      • P(E)
    • Vars
      • R(f);N_SPINR(f),XQ(C)::R1(J)
      • S(a);N_GUARD,XP(E)::B(F)
      • S(c);OGATE,XS(I)::R1(K),XS(c)
      • Q(j);N_GUARD,P_PINP(E)::QAR2(C)
      • B(h);N_GUARD::S(A),XB(h)
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