MESON Chess Problem Database

Problem Display
PID: 211121 (5Q2/3N1p1p/2K1p1b1/3P1k1r/4p1Rp/2b2rpB/6P1/8 w - - 0 1)

Zajic, Helmut

Deutsche Schachblatter, 1990

5Q2/3N1p1p/2K1p1b1/3P1k1r/4p1Rp/2b2rpB/6P1/8

#2

7 + 11

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qd6?
      • threat
        • 2.Rxg3#
      • 1...Rf4
        • 2.Qxf4#
      • 1...Rg5
        • 2.Rf4#
      • 1...Be5
        • 2.Qxe5#
      • 1...e5
        • 2.Qf6#
      • 1...e3!
    • 1.Qh6?
      • threat
        • 2.Rxg3#
        • 2.Rf4#
        • 2.Rxh4#
        • 2.Rxg6#
      • 1...Rf4
        • 2.Rxf4#
        • 2.Rg5#
        • 2.Qxf4#
      • 1...Rg5
        • 2.Qxg5#
      • 1...e3
        • 2.Ra4#
        • 2.Rb4#
        • 2.Rc4#
        • 2.Rd4#
        • 2.Rf4#
        • 2.Rxh4#
      • 1...Rxh6!
    • 1.Qxf7+?
      • 1...Bf6
        • 2.Qxe6#
        • 2.Qxf6#
      • 1...Bxf7!
    • 1.Qb8?
      • threat
        • 2.Rxg3#
      • 1...Rf4
        • 2.Qxf4#
      • 1...Rg5
        • 2.Rf4#
      • 1...Be5
        • 2.Qxe5#
      • 1...e3
        • 2.Qb1#
      • 1...e5!
    • 1.Qd8?
      • threat
        • 2.Rxh4#
      • 1...Rf4
        • 2.Rg5#
      • 1...Rg5
        • 2.Qxg5#
      • 1...Bf6
        • 2.Qxf6#
      • 1...f6!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Rxh4#
      • 1...Rf4
        • 2.Rg5#
      • 1...Rg5
        • 2.Qxg5#
      • 1...Bf6
        • 2.Qxf6#
      • 1...f6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(G);N_PINP(j)
      • Threat
        • B(B)+R(C),XP(c)
      • Vars
        • R(b);N_GUARD::QAR1(G),XR(b)
        • R(g);SBLOCK::B(B)+R(C),DCHECK
        • B(a);N_GUARD::QAR1(G),XB(a)
        • P(h);OGATE::QAR1(G)
      • Refutation
        • P(d);
    • Try
      • Q(G);N_PINP(j)
      • Threat
        • DUALS(4)
      • Vars
        • R(g);N_GUARD::QAR1(G),XR(g)
      • Refutation
        • R(g);XQ(G)
    • Try
      • Q(G);CHECK,XP(j)
      • Refutation
        • B(i);XQ(G)
    • Try
      • Q(G);N_PINP(j)
      • Threat
        • B(B)+R(C),XP(c)
      • Vars
        • R(b);N_GUARD::QAR1(G),XR(b)
        • R(g);SBLOCK::B(B)+R(C),DCHECK
        • B(a);N_GUARD::QAR1(G),XB(a)
        • P(d);OGATEB::QAB(G)
      • Refutation
        • P(h);
    • Try
      • Q(G);N_PINP(j)
      • Threat
        • B(B)+R(C),XP(e)
      • Vars
        • R(b);SBLOCK::B(B)+R(C),DCHECK
        • R(g);N_GUARD::QAR1(G),XR(g)
        • B(a);N_GUARD::QAR1(G),XB(a)
      • Refutation
        • P(j);
  • Actual
    • Q(G);N_PINP(j)
    • Threat
      • B(B)+R(C),XP(e)
    • Vars
      • R(b);SBLOCK::B(B)+R(C),DCHECK
      • R(g);N_GUARD::QAR1(G),XR(g)
      • B(a);N_GUARD::QAR1(G),XB(a)
      • P(j);N_GUARD::QAB1(G),XP(h)
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