MESON Chess Problem Database

Problem Display
PID: 28816 (8/3p3K/6Qp/3pk1qR/2Pp1NPB/2PP3n/3n1P1N/8 w - - 0 1)

Aloni, Yoel

StrateGems, 2001

8/3p3K/6Qp/3pk1qR/2Pp1NPB/2PP3n/3n1P1N/8

#2

11 + 8

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf4
      • 2.Bg3#
    • 1...Qf5
      • 2.Rxf5#
    • 1...Qxh5
      • 2.Qf6#
  • Tries
    • 1.Se2?
      • threat
        • 2.cxd4#
      • 1...dxc3
        • 2.d4#
      • 1...Sb3
        • 2.Sf3#
      • 1...Sf3
        • 2.Sxf3#
      • 1...dxc4!
    • 1.Sxd5?
      • threat
        • 2.Qf6#
      • 1...Qf5
        • 2.Rxf5#
      • 1...Se4
        • 2.Sf3#
      • 1...Sxc4!
    • 1.Qe8+?
      • 1...Kxf4
        • 2.Bg3#
      • 1...Kf6
        • 2.Sxd5#
        • 2.Rxh6#
      • 1...Kd6!
    • 1.Qe6+?
      • 1...Kxf4
        • 2.Bg3#
      • 1...dxe6!
    • 1.Qg7+?
      • 1...Kxf4
        • 2.Bg3#
      • 1...Kd6!
    • 1.cxd4+?
      • 1...Kxf4
        • 2.Bg3#
      • 1...Kxd4!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Sg6#
      • 1...Kxf4
        • 2.Bg3#
      • 1...Qxh5
        • 2.Qf6#
      • 1...Sxf4
        • 2.cxd4#
      • 1...dxc4
        • 2.Qxd4#
      • 1...d6
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(e);N_SPINQ(f),OGATEB,S_FLIGHT,XS(F)::B(H)
    • Q(f);OGATE,P_PINQ(J)::R1(I),XQ(f)
    • Q(f);N_SPINQ(f),XR(I)::QAB1(J)
  • Tries
    • Try
      • S(F);
      • Threat
        • P(C),XP(c)
      • Vars
        • P(c);OGATE,XP(C)::P(D)
        • S(a);N_GUARD::S(B)
        • S(a);N_GUARD::S(B),XS(a)
      • Refutation
        • P(d);XP(E)
    • Try
      • S(F);XP(d)
      • Threat
        • QAB1(J)
      • Vars
        • Q(f);OGATE,P_PINQ(J)::R1(I),XQ(f)
        • S(a);N_GUARD::S(B)
      • Refutation
        • S(a);XP(E)
    • Try
      • Q(J);CHECK
      • Vars
        • K(e);N_SPINQ(f),S_FLIGHT,XS(F)::B(H)
      • Refutation
        • K(e);N_SPINQ(f),S_FLIGHT
    • Try
      • Q(J);CHECK
      • Vars
        • K(e);N_SPINQ(f),S_FLIGHT,XS(F)::B(H)
      • Refutation
        • P(h);XQ(J)
    • Try
      • Q(J);CHECK
      • Vars
        • K(e);N_SPINQ(f),S_FLIGHT,XS(F)::B(H)
      • Refutation
        • K(e);N_SPINQ(f),S_FLIGHT
    • Try
      • P(C);CHECK,XP(c)
      • Vars
        • K(e);N_SPINQ(f),S_FLIGHT,XS(F)::B(H)
      • Refutation
        • K(e);N_SPINQ(f),S_FLIGHT,XP(C)
  • Actual
    • Q(J);
    • Threat
      • S(F)
    • Vars
      • K(e);N_SPINQ(f),OGATEB,S_FLIGHT,XS(F)::B(H)
      • Q(f);N_SPINQ(f),XR(I)::QAB1(J)
      • S(b);SBLOCK,XS(F)::P(C),XP(c)
      • P(d);XP(E)::QAB1(J),XP(c)
      • P(h);SBLOCK::QAB1(J),XP(c)
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