MESON Chess Problem Database

Problem Display
PID: 204409 (n2BK3/qp1R4/p2P2N1/R1PkNPb1/2p1p3/2P5/P2PP3/Q7 w - - 0 1)

Wahlmark, Carl Primus

3rd Prize, American Chess Bulletin, 1925

n2BK3/qp1R4/p2P2N1/R1PkNPb1/2p1p3/2P5/P2PP3/Q7

#2

14 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qb6
      • 2.cxb6#
    • 1...Be7
      • 2.dxe7#
    • 1...Sb6
      • 2.cxb6#
      • 2.c6#
    • 1...Sc7+
      • 2.dxc7#
    • 1...e3
      • 2.Qh1#
    • 1...b5
      • 2.cxb5 ep#
    • 1...b6
      • 2.cxb6#
  • Tries
    • 1.Qg1?
      • threat
        • 2.Qd4#
      • 1...Sc7+
        • 2.dxc7#
      • 1...e3
        • 2.Qh1#
        • 2.Qg2#
      • 1...Be3!
    • 1.d4?
      • 1...Sc7+
        • 2.dxc7#
      • 1...Qxc5
        • 2.Rxc5#
      • 1...Bxd8
        • 2.Sf4#
      • 1...cxd4 ep
        • 2.c4#
      • 1...exd4 ep
        • 2.Qh1#
      • 1...e3
        • 2.Qh1#
      • 1...Be3
        • 2.Se7#
      • 1...Qb6
        • 2.cxb6#
      • 1...Bc1
        • 2.Se7#
      • 1...Bd2
        • 2.Se7#
      • 1...Bf4
        • 2.Sxf4#
        • 2.Se7#
      • 1...Bh4
        • 2.Sf4#
      • 1...Bf6
        • 2.Sf4#
      • 1...Bh6
        • 2.Se7#
      • 1...Be7
        • 2.Sf4#
        • 2.Sxe7#
        • 2.dxe7#
      • 1...Sb6
        • 2.cxb6#
        • 2.c6#
      • 1...b5
        • 2.cxb5 ep#
      • 1...b6
        • 2.cxb6#
      • 1...Qb8!
  • Keys
    • 1.d3!
      • threat
        • 2.dxc4#
      • 1...Sc7+
        • 2.dxc7#
      • 1...cxd3
        • 2.c4#
      • 1...exd3
        • 2.Qh1#
      • 1...b5
        • 2.cxb5 ep#
      • 1...Sb6
        • 2.cxb6#
        • 2.c6#
      • 1...e3
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(f);OGATE::R(F)+P(G),XQ(f)
    • B(d);OGATE::R(L)+P(J),XB(d)
    • S(h);CHECK,OGATE::R(L)+P(J),XS(h)
    • P(b);OGATEB::QAB(A)
    • P(g);OGATE::R(F)+P(G),XP(g),EP
    • P(g);OGATE::R(F)+P(G),XP(g)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(h);CHECK,OGATE::R(L)+P(J),XS(h)
      • Refutation
        • B(d);
    • Try
      • P(C);
      • Vars
        • S(h);CHECK,OGATE::R(L)+P(J),XS(h)
        • Q(f);OGATE,P_SPINQ(f),XP(G)::R1(F),XQ(f)
        • B(d);N_GUARD,XB(M)::S(K)
        • P(a);EP,OGATE,XP(C)::P(E)
        • P(b);EP,OGATEB,XP(C)::QAB(A)
        • P(b);OGATEB::QAB(A)
        • B(d);N_GUARD::S(K)
        • Q(f);OGATE::R(F)+P(G),XQ(f)
        • P(g);OGATE::R(F)+P(G),XP(g),EP
        • P(g);OGATE::R(F)+P(G),XP(g)
      • Refutation
        • Q(f);P_PINB(M)
  • Actual
    • P(C);
    • Threat
      • P(C),XP(a)
    • Vars
      • S(h);CHECK,OGATE::R(L)+P(J),XS(h)
      • P(a);OGATE,XP(C)::P(E)
      • P(b);OGATEB,XP(C)::QAB(A)
      • P(g);OGATE::R(F)+P(G),XP(g),EP
      • P(b);OGATEB::QAB(A)
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