MESON Chess Problem Database

Problem Display
PID: 11893 (8/nKQ2Rr1/1ppp3R/3k1p1B/N7/brnP1N1b/2P5/6B1 w - - 0 1)

van Gool, Johann Christoffel

2nd HM., KeyStip 07. Ty., 1973

8/nKQ2Rr1/1ppp3R/3k1p1B/N7/brnP1N1b/2P5/6B1

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Sxc3#
    • 1...Rb2
      • 2.Sxc3#
    • 1...Rb4
      • 2.Sxc3#
      • 2.Rxd6#
      • 2.Qxd6#
    • 1...Rb5
      • 2.Sxc3#
    • 1...Rg4
      • 2.Rxf5#
    • 1...Rxf7
      • 2.Bxf7#
      • 2.Qxf7#
    • 1...Bc1
      • 2.Rxd6#
      • 2.Qxd6#
    • 1...Bb2
      • 2.Rxd6#
      • 2.Qxd6#
    • 1...Bb4
      • 2.Sxb6#
    • 1...Bf1
      • 2.Rxf5#
    • 1...Bg2
      • 2.Rxf5#
    • 1...Sb1
      • 2.c4#
    • 1...Sd1
      • 2.c4#
    • 1...Sa2
      • 2.c4#
    • 1...Se2
      • 2.c4#
    • 1...Sxa4
      • 2.c4#
    • 1...Se4
      • 2.c4#
    • 1...Scb5
      • 2.Sxb6#
      • 2.c4#
    • 1...Sab5
      • 2.Sxb6#
      • 2.Qxc6#
    • 1...Sc8
      • 2.Qxc6#
    • 1...b5
      • 2.Sb6#
    • 1...c5
      • 2.Rxd6#
      • 2.Qxd6#
  • Keys
    • 1.Qxb6!
      • threat
        • 2.Qxb3#
      • 1...Rxb6+
        • 2.Sxb6#
      • 1...Rxf7+
        • 2.Bxf7#
      • 1...Rb1
        • 2.Sxc3#
      • 1...Rb2
        • 2.Sxc3#
      • 1...Rb4
        • 2.Sxc3#
      • 1...Rb5
        • 2.Sxc3#
      • 1...Rg4
        • 2.Rxf5#
      • 1...Bb4
        • 2.Qd4#
      • 1...Scb5
        • 2.c4#
      • 1...Sab5
        • 2.Qxc6#
      • 1...c5
        • 2.Rxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 10
  • Sets
    • R(b);N_GUARD::S(E),XS(c)
    • R(k);S_CUTB(d)::R(J),XP(f)
    • B(a);S_CUTR(b)::S(E),XP(g)
    • B(d);N_GUARD::R(J),XP(f)
    • S(c);OGATE::P(B)
    • S(c);OGATE,XS(E)::P(B)
    • S(j);N_GUARD::QAB1(I),XP(h)
    • P(g);S_CUTR(b)::S(E)
  • Actual
    • Q(I);P_SPINQ(I),P_SPINR(J),XP(g)
    • Threat
      • QAB(I),XR(b)
    • Vars
      • R(b);CHECK,XQ(I)::S(E),XR(b)
      • R(k);CHECK,OGATE,XR(J)::B(F),XR(k)
      • R(b);N_GUARD::S(E),XS(c)
      • R(k);N_PINR(J)::R(J),XP(f)
      • B(a);N_PINQ(I)::QAR1(I)
      • S(c);N_PINQ(I),OGATE::P(B)
      • S(j);N_PINQ(I)::QAB1(I),XP(h)
      • P(h);S_CUTB(a)::R1(G),XP(i)
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