MESON Chess Problem Database

Problem Display
PID: 174803 (3R1R2/2r1p3/1PP1p1p1/2N1k1Pq/1BK2N1p/2PBb3/Q7/6n1 w - - 0 1)

Barth, Michael

1/2 Prize, Kaspiy, 2006

3R1R2/2r1p3/1PP1p1p1/2N1k1Pq/1BK2N1p/2PBb3/Q7/6n1

#2

12 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Sxg6#
    • 1...Qe2
      • 2.Sxg6#
    • 1...Qf3
      • 2.Sxg6#
    • 1...Qh8
      • 2.Sxg6#
    • 1...Rd7
      • 2.Sxd7#
    • 1...Rc8
      • 2.Sd7#
    • 1...Bd4
      • 2.cxd4#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qxe3#
      • 1...Qxe2
        • 2.Sxg6#
      • 1...Rd7
        • 2.Sxd7#
      • 1...Qf3
        • 2.Sxg6#
      • 1...Sxe2!
    • 1.Qf2?
      • threat
        • 2.Qxe3#
      • 1...Bxf4
        • 2.Qd4#
        • 2.Qxf4#
      • 1...Bxc5
        • 2.Qxc5#
      • 1...Rd7
        • 2.Sxd7#
      • 1...Qe2
        • 2.Sxg6#
      • 1...Qf3
        • 2.Sxg6#
      • 1...Bc1
        • 2.Qd4#
      • 1...Bd2
        • 2.Qd4#
      • 1...Bd4
        • 2.Qxd4#
        • 2.cxd4#
      • 1...Bxf2!
    • 1.Qg2?
      • threat
        • 2.Qe4#
      • 1...Rd7
        • 2.Sxd7#
      • 1...Qf3
        • 2.Sxg6#
      • 1...Sf3!
    • 1.Qh2?
      • threat
        • 2.Sxg6#
      • 1...Bxf4
        • 2.Qxf4#
      • 1...Qg4!
    • 1.Qa5?
      • threat
        • 2.Sd7#
      • 1...Bxc5
        • 2.Qxc5#
      • 1...Rd7
        • 2.Sxd7#
      • 1...Rxc6!
  • Keys
    • 1.Kb5!
      • threat
        • 2.Qxe6#
      • 1...Rxc6
        • 2.Sd7#
      • 1...Qg4
        • 2.Sxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(e);N_GUARD::S(F),XP(g)
    • Q(e);N_GUARD,P_PINB(C)::S(F),XP(g)
    • R(h);N_GUARD::S(G),XR(h)
    • R(h);N_GUARD::S(G)
    • B(b);OGATE::P(B),XB(b)
  • Tries
    • Try
      • Q(A);P_PINB(b)
      • Threat
        • QAR2(A),XB(b)
      • Vars
        • Q(e);N_GUARD,N_SPINB(b),P_PINB(C),XQ(A)::S(F),XP(g)
        • R(h);N_GUARD::S(G),XR(h)
        • Q(e);N_GUARD::S(F),XP(g)
      • Refutation
        • S(a);N_SPINB(b),XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR2(A),XB(b)
      • Vars
        • B(b);OGATE,XS(G)::QAR2(A),XB(b)
        • R(h);N_GUARD::S(G),XR(h)
        • Q(e);N_GUARD,P_PINB(C)::S(F),XP(g)
        • Q(e);N_GUARD::S(F),XP(g)
        • B(b);OGATE::QAB1(A)
      • Refutation
        • B(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • R(h);N_GUARD::S(G),XR(h)
        • Q(e);N_GUARD::S(F),XP(g)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • QAB(A)+S(F),DCHECK,XP(g)
      • Vars
        • B(b);OGATE,P_SPINB(b),XS(F)::QAB1(A),XB(b)
      • Refutation
        • Q(e);P_PINS(F)
    • Try
      • Q(A);
      • Threat
        • QAR(A)+S(G),DCHECK
      • Vars
        • B(b);OGATE,P_SPINB(b),XS(G)::QAR2(A),XB(b)
        • R(h);::QAR(A)+S(G),DCHECK,XR(h)
      • Refutation
        • R(h);P_PINS(G),XP(J)
  • Actual
    • K(E);S_FLIGHT
    • Threat
      • QAR1(A),XP(f)
    • Vars
      • R(h);N_GUARD,XP(J)::S(G)
      • Q(e);N_GUARD::S(F),XP(g)
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