MESON Chess Problem Database
Problem Display
PID: 71741 (6n1/5N2/2N2p2/1n1P1k2/1PRprbR1/1KPQ3P/8/8 w - - 0 1)
Drese, Gerardus Hendrikus
1st Prize, Magasinet, 1939
#2
10 + 7
SOLUTION
- SOUND
- Sets
- 1...Bc1
- 2.Qxe4#
- 1...Bd2
- 2.Qxe4#
- 1...Bh2
- 2.Qxe4#
- 1...Be3
- 2.Qxe4#
- 1...Bg3
- 2.Qxe4#
- 1...Be5
- 2.Qxe4#
- 1...Bg5
- 2.Qxe4#
- 1...Bd6
- 2.Qxe4#
- 1...Bh6
- 2.Qxe4#
- 1...Bc7
- 2.Qxe4#
- 1...Bb8
- 2.Qxe4#
- 1...Sa3
- 2.Sxd4#
- 1...Sxc3
- 2.Sxd4#
- 1...Sd6
- 2.Sxd4#
- 1...Sa7
- 2.Sxd4#
- 1...Sc7
- 2.Sxd4#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...dxc3
- 2.Qxe4#
- 1...Bc1
- Tries
- 1.Ka2?
- 1...dxc3
- 2.Qxe4#
- 1...Bg5
- 2.Qxe4#
- 1...Bc1
- 2.Qxe4#
- 1...Bd2
- 2.Qxe4#
- 1...Bh2
- 2.Qxe4#
- 1...Be3
- 2.Qxe4#
- 1...Bg3
- 2.Qxe4#
- 1...Be5
- 2.Qxe4#
- 1...Bd6
- 2.Qxe4#
- 1...Bh6
- 2.Qxe4#
- 1...Bc7
- 2.Qxe4#
- 1...Bb8
- 2.Qxe4#
- 1...Sa3
- 2.Sxd4#
- 1...Sd6
- 2.Sxd4#
- 1...Sa7
- 2.Sxd4#
- 1...Sc7
- 2.Sxd4#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sxc3+!
- 1...dxc3
- 1.Kc2?
- 1...Sxc3
- 2.Sxd4#
- 1...dxc3
- 2.Qxe4#
- 1...Bg5
- 2.Qxe4#
- 1...Bc1
- 2.Qxe4#
- 1...Bd2
- 2.Qxe4#
- 1...Bh2
- 2.Qxe4#
- 1...Be3
- 2.Qxe4#
- 1...Bg3
- 2.Qxe4#
- 1...Be5
- 2.Qxe4#
- 1...Bd6
- 2.Qxe4#
- 1...Bh6
- 2.Qxe4#
- 1...Bc7
- 2.Qxe4#
- 1...Bb8
- 2.Qxe4#
- 1...Sd6
- 2.Sxd4#
- 1...Sa7
- 2.Sxd4#
- 1...Sc7
- 2.Sxd4#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sa3+!
- 1...Sxc3
- 1.Ka4?
- 1...dxc3
- 2.Qxe4#
- 1...Bg5
- 2.Qxe4#
- 1...Bc1
- 2.Qxe4#
- 1...Bd2
- 2.Qxe4#
- 1...Bh2
- 2.Qxe4#
- 1...Be3
- 2.Qxe4#
- 1...Bg3
- 2.Qxe4#
- 1...Be5
- 2.Qxe4#
- 1...Bd6
- 2.Qxe4#
- 1...Bh6
- 2.Qxe4#
- 1...Bc7
- 2.Qxe4#
- 1...Bb8
- 2.Qxe4#
- 1...Sa3
- 2.Sxd4#
- 1...Sd6
- 2.Sxd4#
- 1...Sa7
- 2.Sxd4#
- 1...Sc7
- 2.Sxd4#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sxc3+!
- 1...dxc3
- 1.Sd6+?
- 1...Bxd6
- 2.Qxe4#
- 1...Sxd6!
- 1...Bxd6
- 1.Sh6+?
- 1...Bxh6
- 2.Qxe4#
- 1...Sxh6!
- 1...Bxh6
- 1.Rc5?
- 1...Sxc3
- 2.Sxd4#
- 1...Bg5
- 2.Qxe4#
- 1...Sa3
- 2.Sxd4#
- 1...Bc1
- 2.Qxe4#
- 1...Bd2
- 2.Qxe4#
- 1...Bh2
- 2.Qxe4#
- 1...Be3
- 2.Qxe4#
- 1...Bg3
- 2.Qxe4#
- 1...Be5
- 2.Qxe4#
- 1...Bd6
- 2.Qxe4#
- 1...Bh6
- 2.Qxe4#
- 1...Bc7
- 2.Qxe4#
- 1...Bb8
- 2.Qxe4#
- 1...Sd6
- 2.Sxd4#
- 1...Sa7
- 2.Sxd4#
- 1...Sc7
- 2.Sxd4#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...dxc3!
- 1...Sxc3
- 1.Qb1?
- 1...Sxc3
- 2.Sxd4#
- 1...dxc3
- 2.Qxe4#
- 1...Bg5
- 2.Qxe4#
- 1...Sa3
- 2.Sxd4#
- 1...Bc1
- 2.Qxe4#
- 1...Bd2
- 2.Qxe4#
- 1...Bh2
- 2.Qxe4#
- 1...Be3
- 2.Qxe4#
- 1...Bg3
- 2.Qxe4#
- 1...Be5
- 2.Qxe4#
- 1...Bd6
- 2.Qxe4#
- 1...Bh6
- 2.Qxe4#
- 1...Bc7
- 2.Qxe4#
- 1...Bb8
- 2.Qxe4#
- 1...Sd6
- 2.Sxd4#
- 1...Sa7
- 2.Sxd4#
- 1...Sc7
- 2.Sxd4#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...d3!
- 1...Sxc3
- 1.Qc2?
- 1...Sxc3
- 2.Sxd4#
- 1...dxc3
- 2.Qxe4#
- 1...Bg5
- 2.Qxe4#
- 1...Sa3
- 2.Sxd4#
- 1...Bc1
- 2.Qxe4#
- 1...Bd2
- 2.Qxe4#
- 1...Bh2
- 2.Qxe4#
- 1...Be3
- 2.Qxe4#
- 1...Bg3
- 2.Qxe4#
- 1...Be5
- 2.Qxe4#
- 1...Bd6
- 2.Qxe4#
- 1...Bh6
- 2.Qxe4#
- 1...Bc7
- 2.Qxe4#
- 1...Bb8
- 2.Qxe4#
- 1...Sd6
- 2.Sxd4#
- 1...Sa7
- 2.Sxd4#
- 1...Sc7
- 2.Sxd4#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...d3!
- 1...Sxc3
- 1.Ka2?
- Keys
- 1.Qf3!
- 1...Sxc3
- 2.Sd6#
- 1...dxc3
- 2.Qxe4#
- 1...Sa3
- 2.Sd6#
- 1...Re1
- 2.Qxf4#
- 1...Re2
- 2.Qxf4#
- 1...Re3
- 2.Qxf4#
- 1...Re5
- 2.Qxf4#
- 1...Re6
- 2.Qxf4#
- 1...Re7
- 2.Qxf4#
- 1...Re8
- 2.Qxf4#
- 1...Sd6
- 2.Sxd6#
- 1...Sa7
- 2.Sd6#
- 1...Sc7
- 2.Sd6#
- 1...Sh6
- 2.Sxh6#
- 1...Se7
- 2.Sh6#
- 1...d3
- 2.Qxe4#
- 1...Sxc3
- 1.Qf3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 7
- ADDED MATES = 8
- REMOVED MATES = 11
- Sets
- B(c);::QAB1(C),XR(b)
- S(d);N_GUARD::S(I),XP(a)
- S(d);N_GUARD,XP(B)::S(I),XP(a)
- S(g);N_GUARD::S(I)
- S(g);N_GUARD::S(I),XS(g)
- P(a);XP(B)::QAB1(C),XR(b)
- Tries
- Try
- K(A);S_FLIGHT
- Vars
- P(a);XP(B)::QAB1(C),XR(b)
- B(c);::QAB1(C),XR(b)
- S(d);N_GUARD::S(I),XP(a)
- S(g);N_GUARD::S(I)
- S(g);N_GUARD::S(I),XS(g)
- Refutation
- S(d);CHECK,XP(B)
- Try
- K(A);S_FLIGHT
- Vars
- S(d);N_GUARD,XP(B)::S(I),XP(a)
- P(a);XP(B)::QAB1(C),XR(b)
- B(c);::QAB1(C),XR(b)
- S(d);N_GUARD::S(I),XP(a)
- S(g);N_GUARD::S(I)
- S(g);N_GUARD::S(I),XS(g)
- Refutation
- S(d);CHECK
- Try
- K(A);S_FLIGHT
- Vars
- P(a);XP(B)::QAB1(C),XR(b)
- B(c);::QAB1(C),XR(b)
- S(d);N_GUARD::S(I),XP(a)
- S(g);N_GUARD::S(I)
- S(g);N_GUARD::S(I),XS(g)
- Refutation
- S(d);CHECK,XP(B)
- Try
- S(J);CHECK
- Vars
- B(c);XS(J)::QAB1(C),XR(b)
- Refutation
- S(d);XS(J)
- Try
- S(J);CHECK
- Vars
- B(c);XS(J)::QAB1(C),XR(b)
- Refutation
- S(g);XS(J)
- Try
- R(F);
- Vars
- S(d);N_GUARD,XP(B)::S(I),XP(a)
- B(c);::QAB1(C),XR(b)
- S(d);N_GUARD::S(I),XP(a)
- S(g);N_GUARD::S(I)
- S(g);N_GUARD::S(I),XS(g)
- Refutation
- P(a);XP(B)
- Try
- Q(C);
- Vars
- S(d);N_GUARD,XP(B)::S(I),XP(a)
- P(a);XP(B)::QAB1(C),XR(b)
- B(c);::QAB1(C),XR(b)
- S(d);N_GUARD::S(I),XP(a)
- S(g);N_GUARD::S(I)
- S(g);N_GUARD::S(I),XS(g)
- Refutation
- P(a);N_SPINR(b)
- Try
- Q(C);
- Vars
- S(d);N_GUARD,XP(B)::S(I),XP(a)
- P(a);XP(B)::QAB1(C),XR(b)
- B(c);::QAB1(C),XR(b)
- S(d);N_GUARD::S(I),XP(a)
- S(g);N_GUARD::S(I)
- S(g);N_GUARD::S(I),XS(g)
- Refutation
- P(a);N_SPINR(b)
- Try
- Actual
- Q(C);N_PINR(b),P_PINB(c)
- Vars
- S(d);N_GUARD,XP(B)::S(J)
- P(a);XP(B)::QAB1(C),XR(b)
- S(d);N_GUARD::S(J)
- R(b);N_GUARD::QAR1(C),XB(c)
- R(b);N_GUARD,P_PINP(B)::QAR1(C),XB(c)
- S(d);N_GUARD::S(J),XS(d)
- S(g);N_GUARD::S(J),XS(g)
- S(g);N_GUARD::S(J)
- P(a);::QAB1(C),XR(b)
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).