MESON Chess Problem Database

Problem Display
PID: 87383 (4NB2/r2p4/3PR1Pb/1P1k3N/R6p/3P2pq/2K2Qb1/8 w - - 0 1)

Vovan, Nguyen

Matou, 1991

4NB2/r2p4/3PR1Pb/1P1k3N/R6p/3P2pq/2K2Qb1/8

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Qxf5#
    • 1...Qxe6
      • 2.Qd4#
    • 1...Qh1
      • 2.Qf5#
    • 1...Qh2
      • 2.Qf5#
    • 1...Rxa4
      • 2.Sc7#
    • 1...Ra5
      • 2.Sc7#
    • 1...Ra6
      • 2.Sc7#
    • 1...Rc7+
      • 2.Sxc7#
    • 1...Ra8
      • 2.Sc7#
    • 1...Bf4
      • 2.Sxf4#
    • 1...Bg7
      • 2.Sf4#
    • 1...Bxf8
      • 2.Sf4#
    • 1...dxe6
      • 2.Qd4#
  • Tries
    • 1.Rd4+?
      • 1...Kxe6
        • 2.Qf6#
      • 1...Kc5!
    • 1.Qxa7?
      • threat
        • 2.Sc7#
      • 1...Qxe6
        • 2.Qd4#
      • 1...dxe6
        • 2.Qd4#
      • 1...Kxe6!
  • Keys
    • 1.Bg7!
      • threat
        • 2.Re5#
      • 1...Rc7+
        • 2.Sxc7#
      • 1...Kxe6
        • 2.Qf7#
      • 1...Qxe6
        • 2.Qd4#
      • 1...Bxg7
        • 2.Sf4#
      • 1...dxe6
        • 2.Qd4#
      • 1...Qf5
        • 2.Qxf5#
      • 1...Bf4
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(c);N_GUARD,P_PINP(C)::QAR2(B),XQ(c)
    • Q(c);SBLOCK,XR(H)::QAR1(B)
    • Q(c);N_GUARD::QAR2(B)
    • R(g);N_GUARD,XR(D)::S(J)
    • R(g);N_GUARD::S(J)
    • R(g);CHECK,N_GUARD::S(J),XR(g)
    • B(f);N_GUARD::S(F),XB(f)
    • B(f);N_GUARD::S(F)
    • B(f);N_GUARD,XB(K)::S(F)
    • P(h);SBLOCK,XR(H)::QAR1(B)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(e);S_FLIGHT,XR(H)::QAR1(B)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(B);XR(g)
      • Threat
        • S(J)
      • Vars
        • Q(c);SBLOCK,XR(H)::QAR1(B)
        • P(h);SBLOCK,XR(H)::QAR1(B)
      • Refutation
        • K(e);S_FLIGHT,XR(H)
  • Actual
    • B(K);
    • Threat
      • R1(H)
    • Vars
      • R(g);CHECK,N_GUARD::S(J),XR(g)
      • K(e);OGATEB,S_FLIGHT,XR(H)::QAB1(B)
      • Q(c);SBLOCK,XR(H)::QAR1(B)
      • B(f);N_GUARD,XB(K)::S(F)
      • P(h);SBLOCK,XR(H)::QAR1(B)
      • Q(c);N_GUARD,P_PINP(C)::QAR2(B),XQ(c)
      • B(f);N_GUARD::S(F),XB(f)
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