MESON Chess Problem Database

Problem Display
PID: 176297 (5n1B/2N4b/3r1r2/qpPPk2N/6P1/P1pRK3/1Q1P4/4R3 w - - 0 1)

Haring, Jacobus

Schach-Echo, 1972

5n1B/2N4b/3r1r2/qpPPk2N/6P1/P1pRK3/1Q1P4/4R3

#2

12 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qb6
      • 2.Qxc3#
    • 1...Qxc7
      • 2.Qxc3#
    • 1...Qa6
      • 2.Qxc3#
    • 1...Qa7
      • 2.Qxc3#
    • 1...Qa8
      • 2.Qxc3#
    • 1...Rxd5
      • 2.Bxf6#
      • 2.Rxd5#
    • 1...Rd7
      • 2.Bxf6#
    • 1...Rd8
      • 2.Bxf6#
    • 1...Bxd3
      • 2.Kxd3#
    • 1...Se6
      • 2.Bxf6#
  • Tries
    • 1.Sxf6?
      • threat
        • 2.Sd7#
      • 1...Rd7
        • 2.Sxd7#
      • 1...Sd7
        • 2.Sxd7#
      • 1...Rxf6!
    • 1.Rxc3?
      • threat
        • 2.d4#
      • 1...Qxc3+
        • 2.Qxc3#
      • 1...Qxc7
        • 2.Rd3#
      • 1...Rxd5
        • 2.Bxf6#
      • 1...Qa4
        • 2.Rc4#
      • 1...Bd3
        • 2.Kxd3#
      • 1...Se6
        • 2.Bxf6#
      • 1...Qb4!
  • Keys
    • 1.dxc3!
      • threat
        • 2.Qh2#
      • 1...Qb4
        • 2.cxb4#
      • 1...Qa4
        • 2.c4#
      • 1...Se6
        • 2.Bxf6#
      • 1...Sg6
        • 2.Kd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(b);N_GUARD,P_PINP(H)::QAB(B),XP(a)
    • Q(b);N_GUARD,XS(K)::QAB(B),XP(a)
    • Q(b);N_GUARD::QAB(B),XP(a)
    • R(e);N_GUARD::B(L),XR(f)
    • B(g);XR(E)::R(A)+K(F),XB(g)
    • S(h);S_CUTR(e)::B(L),XR(f)
  • Tries
    • Try
      • S(J);XR(f)
      • Threat
        • B(L)+S(J),DCHECK
      • Vars
        • R(e);::B(L)+S(J),DCHECK,XR(e)
        • S(h);::B(L)+S(J),DCHECK,XS(h)
      • Refutation
        • R(e);P_SPINR(e),XS(J)
    • Try
      • R(E);XP(a)
      • Threat
        • P(C)
      • Vars
        • Q(b);CHECK,OGATE,P_SPINQ(b),XR(E)::QAB(B),XQ(b)
        • Q(b);N_GUARD,XS(K)::QAB(B)+R(E)
        • R(e);N_GUARD,XP(I)::B(L),XR(f)
        • Q(b);N_GUARD::QAB(B)+R(E)
        • B(g);::R(A)+K(F),XB(g)
        • S(h);S_CUTR(e)::B(L),XR(f)
      • Refutation
        • Q(b);
  • Actual
    • P(C);XP(a)
    • Threat
      • QAB(B)
    • Vars
      • Q(b);OGATE::QAB(B)+P(C),XQ(b)
      • Q(b);N_GUARD::QAB(B)+P(C)
      • S(h);S_CUTR(e)::B(L),XR(f)
      • S(h);S_CUTB(g)::R(A)+K(F)
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