MESON Chess Problem Database

Problem Display
PID: 103501 (8/5Nbb/5p2/pp1P1Qp1/1P1kpp2/1PR5/1K3N2/2B4B w - - 0 1)

Candela Sanz, Rafael

El Ajedrez Espanol, 1950

8/5Nbb/5p2/pp1P1Qp1/1P1kpp2/1PR5/1K3N2/2B4B

#2

10 + 9

259 Thema Danicum 1992
6490 yacpdb 2009
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bg8
      • 2.Qxe4#
    • 1...e3
      • 2.Rd3#
    • 1...f3
      • 2.Be3#
  • Tries
    • 1.Sd8?
      • threat
        • 2.Sc6#
        • 2.Se6#
      • 1...Bg8
        • 2.Sc6#
        • 2.Qxe4#
      • 1...Bxf5!
    • 1.Qxh7?
      • threat
        • 2.Qxe4#
      • 1...Kxd5
        • 2.Qxe4#
      • 1...e3
        • 2.Rd3#
        • 2.Qd3#
        • 2.Qe4#
      • 1...f5!
    • 1.Qc8?
      • threat
        • 2.Qc5#
      • 1...Kxd5
        • 2.Rd3#
        • 2.Qd7#
      • 1...Bf8!
    • 1.Qxf4?
      • threat
        • 2.Rd3#
        • 2.Qd2#
      • 1...Kxd5
        • 2.Qd6#
      • 1...axb4
        • 2.Qd2#
      • 1...gxf4!
    • 1.Qxf6+?
      • 1...Kxd5
        • 2.Rd3#
        • 2.Rc5#
        • 2.Qd6#
      • 1...Bxf6!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qd1#
      • 1...Kxd5
        • 2.Qd7#
      • 1...e3
        • 2.Bxe3#
      • 1...f3
        • 2.Rd3#

This anticipates 242819(1989), 81644(2008)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(i);N_GUARD::QAR1(I),XP(b)
    • P(b);N_GUARD::R1(F)
    • P(c);N_GUARD::B(A)
  • Tries
    • Try
      • S(J);
      • Threat
        • DUALS(2)
      • Refutation
        • B(i);XQ(I)
    • Try
      • Q(I);XB(i)
      • Threat
        • QAR1(I),XP(b)
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b),XP(H)::QAB1(I),XP(b)
      • Refutation
        • P(g);
    • Try
      • Q(I);
      • Threat
        • QAB1(I)
      • Refutation
        • B(h);
    • Try
      • Q(I);P_PINP(b),XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(H)::QAR1(I)
        • P(d);XP(G)::QAR2(I)
      • Refutation
        • P(f);N_SPINP(b),XQ(I)
    • Try
      • Q(I);CHECK,XP(g)
      • Refutation
        • B(h);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAR(I)
    • Vars
      • K(a);OGATEB,P-FLIGHT,P_SPINP(b),XP(H)::QAR2(I)
      • P(b);P_SPINP(c)::B(A),XP(b)
      • P(c);P_SPINP(b)::R1(F)
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