MESON Chess Problem Database

Problem Display
PID: 143154 (2RR4/1nPb4/8/pN1P4/N1k2p2/2P1nP2/4K3/1Q4B1 w - - 0 1)

van Dijk, Nils Gustav Gerard

US Problem Bulletin, 1963

2RR4/1nPb4/8/pN1P4/N1k2p2/2P1nP2/4K3/1Q4B1

#2

11 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Qe4#
    • 1...Bh3
      • 2.Sa3#
    • 1...Bg4
      • 2.Sa3#
    • 1...Bxb5
      • 2.Qa2#
    • 1...Bf5
      • 2.Sa3#
    • 1...Bc6
      • 2.Sa3#
    • 1...Be6
      • 2.Sa3#
    • 1...Bxc8
      • 2.Sa3#
    • 1...Be8
      • 2.Sa3#
    • 1...Sd1
      • 2.Sb6#
    • 1...Sf1
      • 2.Sb6#
    • 1...Sc2
      • 2.Sb6#
    • 1...Sg2
      • 2.Sb6#
    • 1...Sg4
      • 2.Sb6#
    • 1...Sxd5
      • 2.Sa3#
    • 1...Sf5
      • 2.Sb6#
    • 1...Sc5
      • 2.Sb6#
  • Tries
    • 1.Bxe3?
      • threat
        • 2.Sb6#
      • 1...Kxd5
        • 2.Qe4#
      • 1...Bxb5
        • 2.Qa2#
      • 1...fxe3!
    • 1.Rxd7?
      • threat
        • 2.Sa3#
      • 1...Sc2
        • 2.Sb6#
      • 1...Sd6!
    • 1.Qb4+?
      • 1...Kxd5
        • 2.Qe4#
      • 1...axb4!
  • Keys
    • 1.Rb8!
      • 1...Kxd5
        • 2.Qe4#
      • 1...Bxb5
        • 2.Qa2#
      • 1...Sxd5
        • 2.Sa3#
      • 1...Sxd8
        • 2.Qa2#
      • 1...Sd6
        • 2.Qa2#
      • 1...Bh3
        • 2.Sa3#
      • 1...Bg4
        • 2.Sa3#
      • 1...Bf5
        • 2.Sa3#
      • 1...Bc6
        • 2.Sa3#
      • 1...Be6
        • 2.Sa3#
      • 1...Bc8
        • 2.Sa3#
      • 1...Be8
        • 2.Sa3#
      • 1...Sd1
        • 2.Sb6#
      • 1...Sf1
        • 2.Sb6#
      • 1...Sc2
        • 2.Sb6#
      • 1...Sg2
        • 2.Sb6#
      • 1...Sg4
        • 2.Sb6#
      • 1...Sf5
        • 2.Sb6#
      • 1...Sc5
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P_SPINB(f),S_FLIGHT,XP(H)::QAB1(A)
    • B(f);::S(G)
    • B(f);P_PINP(E)::S(G)
    • B(f);SBLOCK,XS(G)::QAB(A)
    • B(f);XR(J)::S(G)
    • S(a);::S(F)
    • S(a);SBLOCK,XP(H)::S(G)
    • S(e);SBLOCK::S(F)
  • Tries
    • Try
      • B(B);XS(a)
      • Threat
        • S(F)
      • Vars
        • K(b);P_SPINB(f),S_FLIGHT,XP(H)::QAB1(A)
        • B(f);SBLOCK,XS(G)::QAB(A)
      • Refutation
        • P(c);XB(B)
    • Try
      • R(K);XB(f)
      • Threat
        • S(G)
      • Vars
        • S(a);::S(F)
      • Refutation
        • S(e);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P_SPINB(f),S_FLIGHT,XP(H)::QAB1(A)
      • Refutation
        • P(d);XQ(A)
  • Actual
    • R(J);
    • Vars
      • K(b);P_SPINB(f),S_FLIGHT,XP(H)::QAB1(A)
      • B(f);SBLOCK,XS(G)::QAB(A)
      • S(a);SBLOCK,XP(H)::S(G)
      • S(e);XR(K)::QAB(A)
      • S(e);::QAB(A)
      • B(f);::S(G)
      • B(f);P_PINP(E)::S(G)
      • S(a);::S(F)
      • S(e);SBLOCK::S(F)
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