MESON Chess Problem Database

Problem Display
PID: 174747 (2NRBR2/8/4b2K/1Pp3P1/2p1k1p1/4P3/5P1b/Q7 w - - 0 1)

Zajic, Helmut

4th Comm., Die Schwalbe, 1964-11

2NRBR2/8/4b2K/1Pp3P1/2p1k1p1/4P3/5P1b/Q7

#2

10 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Rf4#
    • 1...Bf4
      • 2.Rxf4#
    • 1...Be5
      • 2.Qb1#
      • 2.Qh1#
    • 1...Bd5
      • 2.Bg6#
    • 1...Bf5
      • 2.Bc6#
    • 1...Bxc8
      • 2.Bc6#
    • 1...Bg8
      • 2.Bg6#
    • 1...g3
      • 2.Rf4#
  • Tries
    • 1.Rd4+?
      • 1...cxd4
        • 2.Qxd4#
      • 1...Ke5!
    • 1.Rf5?
      • threat
        • 2.Qb1#
      • 1...Kxf5
        • 2.Bg6#
      • 1...Bxf5
        • 2.Bc6#
      • 1...Bf4
        • 2.Rxf4#
      • 1...c3!
    • 1.Qa8+?
      • 1...Bd5
        • 2.Qxd5#
      • 1...Ke5!
    • 1.f3+?
      • 1...Kxe3
        • 2.Qe1#
      • 1...gxf3!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Qh1#
      • 1...Kxd5
        • 2.Bc6#
      • 1...Bxd5
        • 2.Bg6#
      • 1...Bg1
        • 2.Qe5#
      • 1...g3
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::R1(J)
    • B(a);N_GUARD,P_PINP(E)::R1(J),XB(a)
    • B(f);N_GUARD::B(I)
    • B(f);N_GUARD,XS(G)::B(I)
    • P(d);S_CUTB(a)::R1(J)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • P(e);OGATE,XR(H)::QAR1(A),XP(e)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(J);
      • Threat
        • QAB(A)
      • Vars
        • K(c);OGATEB,S_FLIGHT,XR(J)::B(I)
        • B(f);N_GUARD,SBLOCK,XR(J)::B(I)
        • B(a);N_GUARD,P_PINP(E)::R1(J),XB(a)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAB1(A),XB(f)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • P(B);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(C)::QAR2(A)
      • Refutation
        • P(d);XP(B)
  • Actual
    • R(H);
    • Threat
      • QAB(A)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XR(H)::B(I)
      • B(f);N_GUARD,SBLOCK,XR(H)::B(I)
      • B(a);N_GUARD::QAR1(A)
      • P(d);S_CUTB(a)::QAR1(A)
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