MESON Chess Problem Database

Problem Display
PID: 146777 (B1b2b2/pr2pP2/4R1Np/1P1kNP2/2p5/BnP2P1K/3q2n1/3Q4 w - - 0 1)

Savournin, Jacques

1/2 Comm., The Problemist, 2012

B1b2b2/pr2pP2/4R1Np/1P1kNP2/2p5/BnP2P1K/3q2n1/3Q4

#2

12 + 11

56 The Problemist 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe6
      • 2.Bxb7#
    • 1...Bg7
      • 2.Sxe7#
    • 1...Se1
      • 2.Sf4#
    • 1...Se3
      • 2.Sf4#
    • 1...Sf4+
      • 2.Sxf4#
    • 1...Sh4
      • 2.Sf4#
    • 1...Sa1
      • 2.Qxd2#
    • 1...Sa5
      • 2.Qxd2#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Re5#
      • 1...Sf4+
        • 2.Sxf4#
      • 1...Bxe6
        • 2.Bxb7#
      • 1...Bg7
        • 2.Sxe7#
      • 1...Sc5!
    • 1.Sc6?
      • threat
        • 2.Re5#
      • 1...Sf4+
        • 2.Sxf4#
      • 1...Bg7
        • 2.Scxe7#
      • 1...Sc5
        • 2.Sb4#
      • 1...Bxe6!
    • 1.Sd7?
      • threat
        • 2.Re5#
      • 1...Sf4+
        • 2.Sxf4#
      • 1...Bg7
        • 2.Sxe7#
      • 1...Sc5!
    • 1.Qxd2+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sxd2!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Re5#
      • 1...Sf4+
        • 2.Sdxf4#
      • 1...Qxc3
        • 2.Sdf4#
      • 1...Bxe6
        • 2.Bxb7#
      • 1...cxd3
        • 2.Qxb3#
      • 1...Qe1
        • 2.Sdf4#
      • 1...Qe3
        • 2.Sdf4#
      • 1...Qf4
        • 2.Sdxf4#
      • 1...Qe2
        • 2.Sdf4#
      • 1...Bg7
        • 2.Sxe7#
      • 1...Sc5
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • B(j);N_GUARD,P_PINP(H),XR(I)::B(L),XR(h)
    • B(k);N_GUARD::S(J),XP(i)
    • S(b);N_GUARD::S(J)
    • S(b);CHECK,N_GUARD::S(J),XS(b)
    • S(c);N_GUARD::QAR(A),XQ(a)
  • Tries
    • Try
      • S(G);
      • Threat
        • R1(I)
      • Vars
        • S(b);CHECK,N_GUARD::S(J),XS(b)
        • B(j);N_GUARD,XR(I)::B(L),XR(h)
        • B(k);N_GUARD::S(J),XP(i)
      • Refutation
        • S(c);
    • Try
      • S(G);N_PINR(h)
      • Threat
        • R1(I)
      • Vars
        • S(b);CHECK,N_GUARD::S(J),XS(b)
        • B(k);N_GUARD::S(G),XP(i)
        • S(c);SBLOCK::S(G)
      • Refutation
        • B(j);P_PINP(H),XR(I)
    • Try
      • S(G);
      • Threat
        • R1(I)
      • Vars
        • S(b);CHECK,N_GUARD::S(J),XS(b)
        • B(k);N_GUARD::S(J),XP(i)
      • Refutation
        • S(c);
    • Try
      • Q(A);CHECK,XQ(a)
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR1(A),XS(c)
      • Refutation
        • S(c);XQ(A)
  • Actual
    • S(G);N_PINQ(a)
    • Threat
      • R1(I)
    • Vars
      • S(b);CHECK,N_GUARD::S(G),XS(b)
      • Q(a);XP(C)::QAR(A)+S(G),DCHECK
      • B(j);N_GUARD,P_PINP(H),XR(I)::B(L),XR(h)
      • P(d);OGATEB,XS(G)::QAB(A),XS(c)
      • Q(a);::QAR(A)+S(G),DCHECK
      • Q(a);P_PINP(D)::QAR(A)+S(G),DCHECK
      • Q(a);::QAR(A)+S(G),DCHECK,XQ(a)
      • B(k);N_GUARD::S(J),XP(i)
      • S(c);SBLOCK::S(G)
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