MESON Chess Problem Database

Problem Display
PID: 163465 (8/q1P5/1rQB4/2Pp4/R1pkn1p1/1PpB1Pn1/2KN2N1/3R3r w - - 0 1)

le Grand, Henk

Probleemblad, 1978

8/q1P5/1rQB4/2Pp4/R1pkn1p1/1PpB1Pn1/2KN2N1/3R3r

#2

12 + 10

5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb3
      • 2.Sxb3#
    • 1...Sxc5
      • 2.Qxc5#
    • 1...gxf3
      • 2.Sxf3#
  • Tries
    • 1.Bxc4?
      • threat
        • 2.Qxd5#
      • 1...Rxc6
        • 2.Ba6#
      • 1...dxc4
        • 2.Rxc4#
      • 1...Qb7
        • 2.Bb5#
      • 1...Rh5
        • 2.Sxe4#
      • 1...Sf6
        • 2.Sf1#
      • 1...Qa8!
    • 1.Bxe4?
      • threat
        • 2.Sf1#
        • 2.Qxd5#
      • 1...Rxd1
        • 2.Qxd5#
      • 1...Rxc6
        • 2.Sf1#
      • 1...cxd2
        • 2.Rxd2#
        • 2.Qxd5#
      • 1...gxf3
        • 2.Qxd5#
      • 1...dxe4
        • 2.Sf1#
        • 2.Rxc4#
      • 1...Qb7
        • 2.Sf1#
      • 1...Qa8
        • 2.Sf1#
      • 1...Re1
        • 2.Qxd5#
      • 1...Rf1
        • 2.Sxf1#
        • 2.Qxd5#
      • 1...Rh5
        • 2.Sb1#
        • 2.Sf1#
        • 2.Sxc4#
      • 1...Sf1
        • 2.Sxf1#
        • 2.Qxd5#
      • 1...Sxe4!
  • Keys
    • 1.Sxc4!
      • threat
        • 2.Be5#
      • 1...Qxc7
        • 2.Sxb6#
      • 1...Rxc6
        • 2.Sa5#
      • 1...Sxd6
        • 2.Bf1#
      • 1...dxc4
        • 2.Rxc4#
      • 1...Rh5
        • 2.Bxe4#

This anticipates 168432(1979)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(i);XP(E)::S(C),XR(i)
    • S(f);OGATE,XP(I)::QAB1(J),XS(f)
    • P(g);XP(G)::S(C),XP(g)
  • Tries
    • Try
      • B(F);XP(d)
      • Threat
        • QAR1(J),XP(h)
      • Vars
        • R(i);N_GUARD,XQ(J)::R(H)+B(F)
        • P(h);OGATE,P_SPINP(h),XB(F)::R1(H),XP(h)
        • Q(j);N_GUARD::R(H)+B(F)
        • R(a);N_GUARD::R(A)+S(C),XS(f)
        • S(f);N_GUARD::R(A)+S(C)
      • Refutation
        • Q(j);
    • Try
      • B(F);XS(f)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XR(A)::QAR1(J),XP(h)
        • R(i);XQ(J)::R(A)+S(C)
        • P(g);XP(G)::QAR1(J),XP(h)
        • Q(j);::R(A)+S(C)
        • R(a);::QAR1(J),XP(h)
      • Refutation
        • S(c);XB(F)
  • Actual
    • S(C);XP(d)
    • Threat
      • B(K)
    • Vars
      • Q(j);N_GUARD,XP(L)::R(H)+S(C),XR(i)
      • R(i);N_GUARD,XQ(J)::R(H)+S(C)
      • S(f);N_GUARD,XB(K)::R(A)+B(F)
      • P(h);OGATE,P_SPINP(h),XS(C)::R1(H),XP(h)
      • R(a);N_GUARD::R(A)+B(F),XS(f)
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