MESON Chess Problem Database
Problem Display
PID: 73412 (4RNB1/q2pB1pr/1Pp4p/pn2k1N1/K1R3P1/2rbP3/p1pn3b/Q7 w - - 0 1)
Willemson, Martin
Aachener Anzeiger, 1928
#2
11 + 15
SOLUTION
- SOUND
- Sets
- 1...Qxb6
- 2.Sxd7#
- 1...Qb8
- 2.Sxd7#
- 1...Qa6
- 2.Sxd7#
- 1...Qa8
- 2.Sxd7#
- 1...Bf4
- 2.exf4#
- 1...Bf1
- 2.Sg6#
- 1...Be2
- 2.Sg6#
- 1...Bxc4
- 2.Sg6#
- 1...Bg6
- 2.Sxg6#
- 1...Sb1
- 2.Sf3#
- 1...Sf1
- 2.Sf3#
- 1...Sb3
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Se4
- 2.Sf3#
- 2.Sg6#
- 1...Sa3
- 2.Qxc3#
- 1...Sd6
- 2.Rc5#
- 2.Qxc3#
- 1...Sc7
- 2.Sxd7#
- 2.Qxc3#
- 1...d5
- 2.Sf7#
- 1...Qxb6
- Tries
- 1.Se4?
- threat
- 2.Sg6#
- 2.Ba3#
- 2.Bb4#
- 2.Bh4#
- 2.Bc5#
- 2.Bg5#
- 2.Bd6#
- 2.Bf6#
- 2.Bd8#
- 1...Bxc4
- 2.Bd6#
- 2.Bf6#
- 1...Sxc4
- 2.Ba3#
- 2.Bb4#
- 2.Bh4#
- 2.Bc5#
- 2.Bg5#
- 2.Bd6#
- 2.Bf6#
- 2.Bd8#
- 1...Sxe4
- 2.Sg6#
- 1...Sd4
- 2.Bd6#
- 2.Bf6#
- 1...Qb8
- 2.Sg6#
- 2.Sxd7#
- 2.Bd6#
- 2.Bf6#
- 2.Bd8#
- 1...Qa8
- 2.Sg6#
- 2.Sxd7#
- 2.Bd6#
- 2.Bf6#
- 2.Bd8#
- 1...Sa3
- 2.Sg6#
- 2.Bxa3#
- 2.Bb4#
- 2.Bh4#
- 2.Bc5#
- 2.Bg5#
- 2.Bd6#
- 2.Bf6#
- 2.Bd8#
- 2.Qxc3#
- 1...Sd6
- 2.Sg6#
- 2.Bxd6#
- 2.Bf6#
- 2.Qxc3#
- 1...Sc7
- 2.Sg6#
- 2.Sxd7#
- 2.Bd6#
- 2.Bf6#
- 2.Qxc3#
- 1...c5
- 2.Sg6#
- 2.Bh4#
- 2.Bxc5#
- 2.Bg5#
- 2.Bd6#
- 2.Bf6#
- 2.Bd8#
- 1...d5
- 2.Sg6#
- 2.Bd6#
- 2.Bf6#
- 1...d6
- 2.Sg6#
- 2.Bxd6#
- 2.Bf6#
- 1...g5
- 2.Sg6#
- 2.Bd6#
- 2.Bf6#
- 1...g6
- 2.Sxg6#
- 2.Bd6#
- 2.Bf6#
- 1...Bxe4!
- threat
- 1.Re4+?
- 1...Sxe4
- 2.Sf3#
- 2.Sg6#
- 1...Bxe4!
- 1...Sxe4
- 1.Qxc3+?
- 1...Sd4
- 2.Qxd4#
- 1...Sxc3+!
- 1...Sd4
- 1.bxa7?
- threat
- 2.Sxd7#
- 1...d5
- 2.Sf7#
- 2.Sd7#
- 1...d6
- 2.Sd7#
- 2.Bd8#
- 1...Bf5!
- threat
- 1.Se4?
- Keys
- 1.Qf1!
- threat
- 2.Ba3#
- 2.Bb4#
- 2.Bc5#
- 1...Ra3+
- 2.Bxa3#
- 1...Rxc4+
- 2.Bb4#
- 1...a1Q+
- 2.Ba3#
- 1...a1R+
- 2.Ba3#
- 1...Bxf1
- 2.Sg6#
- 1...Bxc4
- 2.Sg6#
- 2.Qf5#
- 1...Sxf1
- 2.Sf3#
- 1...Qb8
- 2.Sxd7#
- 1...Qa8
- 2.Sxd7#
- 1...Bf4
- 2.Qxf4#
- 2.exf4#
- 1...Bf5
- 2.Qxf5#
- 1...Bg6
- 2.Sxg6#
- 1...Sf3
- 2.Sxf3#
- 1...Sa3
- 2.Bxa3#
- 2.Bb4#
- 2.Bc5#
- 1...Sd4
- 2.exd4#
- 1...Sd6
- 2.Bf6#
- 1...Sc7
- 2.Sxd7#
- 1...c5
- 2.Bxc5#
- 1...d5
- 2.Sf7#
- 1...d6
- 2.Bf6#
- 1...g6
- 2.Qf6#
- threat
- 1.Qf1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 11
- REMOVED MATES = 8
- Sets
- Q(l);N_GUARD,XP(G)::S(J),XP(m)
- Q(l);N_GUARD::S(J),XP(m)
- B(d);OGATE::P(B),XB(d)
- B(f);N_GUARD::S(J)
- B(f);N_GUARD,XR(D)::S(J)
- B(f);N_GUARD::S(J),XB(f)
- S(c);N_GUARD::S(F)
- S(c);N_GUARD::S(F),XS(c)
- S(h);N_GUARD::QAB(A),XR(e)
- P(m);SBLOCK::S(F)
- Tries
- Try
- S(F);
- Threat
- DUALS(9)
- Vars
- S(c);XS(F)::S(J)
- Refutation
- B(f);XS(F)
- Try
- R(D);CHECK
- Refutation
- B(f);XR(D)
- Try
- Q(A);CHECK,XR(e)
- Vars
- S(h);N_GUARD,P_SPINS(h)::QAB1(A),XS(h)
- Refutation
- S(h);CHECK,XQ(A)
- Try
- P(G);XQ(l)
- Threat
- S(J),XP(m)
- Refutation
- B(f);
- Try
- Actual
- Q(A);N_PINR(e)
- Threat
- DUALS(3)
- Vars
- R(e);CHECK::R(I)+B(H),XR(e)
- R(e);CHECK,XR(D)::R(I)+B(H)
- P(a);CHECK::R(I)+B(H)
- B(f);N_GUARD,XQ(A)::S(J)
- S(c);N_GUARD,XQ(A)::S(F)
- Q(l);N_GUARD::S(J),XP(m)
- B(f);N_GUARD::QAR1(A),XB(f)
- B(f);N_GUARD::S(J),XB(f)
- S(c);N_GUARD::S(F),XS(c)
- S(h);OGATE::P(B),XS(h)
- S(h);SBLOCK::R(I)+B(H),DCHECK
- S(h);S_CUTQ(l)::S(J),XP(m)
- P(j);::R(I)+B(H),XP(j)
- P(m);SBLOCK::S(F)
- P(m);SBLOCK::R(I)+B(H),DCHECK
- P(n);N_GUARD::QAB1(A)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).