MESON Chess Problem Database

Problem Display
PID: 194973 (4R3/2pR2Br/p1Pq3p/4N3/1P1k2n1/2NP1BK1/1b1Q4/1r3b2 w - - 0 1)

Nanning, Frederik Willem

De Maasbode, 1918

4R3/2pR2Br/p1Pq3p/4N3/1P1k2n1/2NP1BK1/1b1Q4/1r3b2

#2

11 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Rxd5#
    • 1...Be2
      • 2.Sxe2#
    • 1...Bg2
      • 2.Se2#
    • 1...Bxd3
      • 2.Se2#
      • 2.Qxd3#
    • 1...Bh3
      • 2.Se2#
    • 1...Bxc3
      • 2.Qf4#
    • 1...Sxe5
      • 2.Bxe5#
    • 1...a5
      • 2.Sb5#
  • Tries
    • 1.Sxb1?
      • threat
        • 2.Qf4#
      • 1...Bxd3
        • 2.Qxd3#
      • 1...Sxe5
        • 2.Bxe5#
      • 1...Sf2
        • 2.Qxf2#
      • 1...Se3
        • 2.Qxb2#
      • 1...Sf6
        • 2.Qf2#
      • 1...Bc1!
    • 1.Sd1?
      • threat
        • 2.Qf4#
      • 1...Bxd3
        • 2.Qxd3#
      • 1...Sxe5
        • 2.Bxe5#
        • 2.Qe3#
      • 1...Bc1
        • 2.Qc3#
      • 1...Sf2
        • 2.Qe3#
        • 2.Qxf2#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sf6
        • 2.Qe3#
        • 2.Qf2#
      • 1...Rxd1!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Qf4#
      • 1...Qxe5+
        • 2.Sf4#
      • 1...Qxb4
        • 2.Qxb4#
      • 1...Qxd5
        • 2.Rxd5#
      • 1...Bxd3
        • 2.Qxd3#
      • 1...Sxe5
        • 2.Qe3#
      • 1...Bc1
        • 2.Qc3#
      • 1...Qf8
        • 2.Se7#
      • 1...Qf6
        • 2.Sxf6#
      • 1...Qg6
        • 2.Sf6#
      • 1...Re1
        • 2.Qxb2#
      • 1...Sf2
        • 2.Qe3#
        • 2.Qxf2#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sf6
        • 2.Qe3#
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 5
  • Sets
    • Q(g);N_PINS(G),OGATE::R1(I),XQ(g)
    • B(b);N_GUARD::S(B),XB(b)
    • B(b);N_GUARD::S(B)
    • B(c);SBLOCK,XS(B)::QAR2(A)
    • S(e);OGATE,P_SPINS(e),XS(G)::B(J),XS(e)
    • P(f);N_GUARD::S(B)
  • Tries
    • Try
      • S(B);XR(a)
      • Threat
        • QAR2(A)
      • Vars
        • B(b);OGATE,P_SPINB(b),XP(C)::QAR1(A),XB(b)
        • S(e);OGATE,P_SPINS(e),XS(G)::B(J),XS(e)
        • S(e);N_GUARD::QAB(A),XS(e)
        • S(e);SBLOCK::QAB(A),XB(c)
        • S(e);N_GUARD::QAB(A)
      • Refutation
        • B(c);
    • Try
      • S(B);
      • Threat
        • QAR2(A)
      • Vars
        • B(b);OGATE,P_SPINB(b),XP(C)::QAR1(A),XB(b)
        • B(c);N_GUARD::QAB1(A)
        • S(e);N_GUARD::QAB1(A),XS(e)
      • Refutation
        • R(a);XS(B)
  • Actual
    • S(B);N_PINQ(g)
    • Threat
      • QAR2(A)
    • Vars
      • Q(g);CHECK,P_SPINQ(g),XS(G)::R(I)+S(B)
      • Q(g);N_PINS(G),OGATE,XP(F)::QAR2(A),XQ(g)
      • Q(g);N_PINS(G),OGATE,P_SPINQ(g),XS(B)::R1(I),XQ(g)
      • B(b);OGATE,P_SPINB(b),XP(C)::QAR1(A),XB(b)
      • S(e);N_GUARD,P_SPINS(e),XS(G)::QAB1(A)
      • B(c);N_GUARD::QAB1(A)
      • Q(g);N_PINS(G)::R(I)+S(B)
      • Q(g);N_PINS(G)::R(I)+S(B),XQ(g)
      • R(a);N_GUARD::QAB(A),XB(c)
      • S(e);N_GUARD::QAB1(A),XS(e)
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