MESON Chess Problem Database
Problem Display
PID: 152297 (N7/1r3p2/2pp1Kp1/1p1k1p2/5R2/1p1B3p/1Pn1PQ1P/n1R5 w - - 0 1)
de Jong, Leonard Nicholaas
Good Companions (October), 1915
#2
9 + 12
SOLUTION
- SOUND
- Sets
- 1...Rb6
- 2.Sxb6#
- 2.Sc7#
- 1...Ra7
- 2.Sb6#
- 1...Rc7
- 2.Sb6#
- 2.Sxc7#
- 1...Rd7
- 2.Sb6#
- 1...Re7
- 2.Sb6#
- 1...Rb8
- 2.Sc7#
- 1...Se1
- 2.Rd4#
- 2.Qd4#
- 1...Sa3
- 2.Rd4#
- 2.Qd4#
- 2.Qf3#
- 1...Se3
- 2.Qf3#
- 1...Sb4
- 2.Rd4#
- 2.Qd4#
- 2.Qf3#
- 1...Sd4
- 2.Rxd4#
- 2.Qxd4#
- 1...b4
- 2.Bc4#
- 1...c5
- 2.Qf3#
- 1...g5
- 2.Rxf5#
- 1...Rb6
- Tries
- 1.Bxc2?
- threat
- 2.Rd1#
- 2.Qd4#
- 1...bxc2
- 2.Qd4#
- 1...c5
- 2.Qf3#
- 1...Sxc2!
- threat
- 1.Be4+?
- 1...Kc4
- 2.Bh1#
- 2.Bg2#
- 2.Bf3#
- 2.Bxc6#
- 1...fxe4!
- 1...Kc4
- 1.Bxb5?
- threat
- 2.Bc4#
- 1...Rxb5
- 2.Sc7#
- 1...Sa3
- 2.Bxc6#
- 2.Rd1#
- 2.Rd4#
- 2.Qd4#
- 2.Qf3#
- 1...Se3
- 2.Bxc6#
- 2.Qf3#
- 1...Sd4
- 2.Rxd4#
- 2.Qxd4#
- 1...c5
- 2.Qf3#
- 1...cxb5!
- threat
- 1.Rxa1?
- 1...Sxa1
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...c5
- 2.Qf3#
- 1...Rb6
- 2.Sxb6#
- 2.Sc7#
- 1...Ra7
- 2.Sb6#
- 1...Rc7
- 2.Sb6#
- 2.Sxc7#
- 1...Rd7
- 2.Sb6#
- 1...Re7
- 2.Sb6#
- 1...Rb8
- 2.Sc7#
- 1...Se1
- 2.Qd4#
- 1...Sa3
- 2.Qd4#
- 1...Sb4
- 2.Qd4#
- 1...b4
- 2.Bc4#
- 1...g5
- 2.Rxf5#
- 1...Se3!
- 1...Sxa1
- 1.Rb1?
- 1...Sd4
- 2.Qxd4#
- 1...c5
- 2.Qf3#
- 1...Rb6
- 2.Sxb6#
- 2.Sc7#
- 1...Ra7
- 2.Sb6#
- 1...Rc7
- 2.Sb6#
- 2.Sxc7#
- 1...Rd7
- 2.Sb6#
- 1...Re7
- 2.Sb6#
- 1...Rb8
- 2.Sc7#
- 1...Se1
- 2.Qd4#
- 1...Sa3
- 2.Qd4#
- 1...Sb4
- 2.Qd4#
- 1...b4
- 2.Bc4#
- 1...g5
- 2.Rxf5#
- 1...Se3!
- 1...Sd4
- 1.Rd1?
- threat
- 2.Bxc2#
- 2.Bc4#
- 1...Sd4
- 2.Qxd4#
- 1...c5
- 2.Qf3#
- 1...Se1
- 2.Bc4#
- 2.Qd4#
- 1...Sa3
- 2.Bb1#
- 2.Bc2#
- 2.Bc4#
- 2.Bxb5#
- 2.Bxf5#
- 2.Qd4#
- 1...Sb4
- 2.Bc4#
- 2.Qd4#
- 1...Se3!
- threat
- 1.Re1?
- 1...Sxe1
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...c5
- 2.Qf3#
- 1...Rb6
- 2.Sxb6#
- 2.Sc7#
- 1...Ra7
- 2.Sb6#
- 1...Rc7
- 2.Sb6#
- 2.Sxc7#
- 1...Rd7
- 2.Sb6#
- 1...Re7
- 2.Sb6#
- 1...Rb8
- 2.Sc7#
- 1...Sa3
- 2.Qd4#
- 1...Sb4
- 2.Qd4#
- 1...b4
- 2.Bc4#
- 1...g5
- 2.Rxf5#
- 1...Se3!
- 1...Sxe1
- 1.Rf1?
- 1...Sd4
- 2.Qxd4#
- 1...c5
- 2.Qf3#
- 1...Rb6
- 2.Sxb6#
- 2.Sc7#
- 1...Ra7
- 2.Sb6#
- 1...Rc7
- 2.Sb6#
- 2.Sxc7#
- 1...Rd7
- 2.Sb6#
- 1...Re7
- 2.Sb6#
- 1...Rb8
- 2.Sc7#
- 1...Se1
- 2.Qd4#
- 1...Sa3
- 2.Qd4#
- 1...Sb4
- 2.Qd4#
- 1...b4
- 2.Bc4#
- 1...g5
- 2.Rxf5#
- 1...Se3!
- 1...Sd4
- 1.Rg1?
- 1...Sd4
- 2.Qxd4#
- 1...c5
- 2.Qf3#
- 1...Rb6
- 2.Sxb6#
- 2.Sc7#
- 1...Ra7
- 2.Sb6#
- 1...Rc7
- 2.Sb6#
- 2.Sxc7#
- 1...Rd7
- 2.Sb6#
- 1...Re7
- 2.Sb6#
- 1...Rb8
- 2.Sc7#
- 1...Se1
- 2.Qd4#
- 1...Sa3
- 2.Qd4#
- 1...Sb4
- 2.Qd4#
- 1...b4
- 2.Bc4#
- 1...g5
- 2.Rxf5#
- 1...Se3!
- 1...Sd4
- 1.Rh1?
- 1...Sd4
- 2.Qxd4#
- 1...c5
- 2.Qf3#
- 1...Rb6
- 2.Sxb6#
- 2.Sc7#
- 1...Ra7
- 2.Sb6#
- 1...Rc7
- 2.Sb6#
- 2.Sxc7#
- 1...Rd7
- 2.Sb6#
- 1...Re7
- 2.Sb6#
- 1...Rb8
- 2.Sc7#
- 1...Se1
- 2.Qd4#
- 1...Sa3
- 2.Qd4#
- 1...Sb4
- 2.Qd4#
- 1...b4
- 2.Bc4#
- 1...g5
- 2.Rxf5#
- 1...Se3!
- 1...Sd4
- 1.Rxc2?
- threat
- 2.Rd4#
- 2.Qd4#
- 2.Qf3#
- 1...bxc2
- 2.Qd4#
- 1...c5
- 2.Qf3#
- 1...Re7
- 2.Sb6#
- 2.Rd4#
- 2.Qd4#
- 1...Sxc2!
- threat
- 1.Rb4?
- 1...c5
- 2.Qf3#
- 1...Rb6
- 2.Sxb6#
- 2.Sc7#
- 1...Ra7
- 2.Sb6#
- 1...Rc7
- 2.Sb6#
- 2.Sxc7#
- 1...Rd7
- 2.Sb6#
- 1...Re7
- 2.Sb6#
- 1...Rb8
- 2.Sc7#
- 1...Se1
- 2.Rd4#
- 2.Qd4#
- 1...Sa3
- 2.Rd4#
- 2.Qd4#
- 2.Qf3#
- 1...Se3
- 2.Qf3#
- 1...Sd4
- 2.Rxd4#
- 2.Qxd4#
- 1...f4
- 2.Be4#
- 1...g5
- 2.Qxf5#
- 1...Sxb4!
- 1...c5
- 1.Rc4?
- threat
- 2.Qf3#
- 1...Re7
- 2.Sb6#
- 1...Se1
- 2.Rd4#
- 2.Qd4#
- 1...Sd4
- 2.Rxd4#
- 2.Qxd4#
- 1...bxc4!
- threat
- 1.Rh4?
- 1...c5
- 2.Qf3#
- 1...Rb6
- 2.Sxb6#
- 2.Sc7#
- 1...Ra7
- 2.Sb6#
- 1...Rc7
- 2.Sb6#
- 2.Sxc7#
- 1...Rd7
- 2.Sb6#
- 1...Re7
- 2.Sb6#
- 1...Rb8
- 2.Sc7#
- 1...Se1
- 2.Rd4#
- 2.Qd4#
- 1...Sa3
- 2.Rd4#
- 2.Qd4#
- 2.Qf3#
- 1...Se3
- 2.Qf3#
- 1...Sb4
- 2.Rd4#
- 2.Qd4#
- 2.Qf3#
- 1...Sd4
- 2.Rxd4#
- 2.Qxd4#
- 1...b4
- 2.Bc4#
- 1...g5
- 2.Qxf5#
- 1...f4!
- 1...c5
- 1.Qg1?
- 1...c5
- 2.Qh1#
- 1...Rb6
- 2.Sxb6#
- 2.Sc7#
- 1...Ra7
- 2.Sb6#
- 1...Rc7
- 2.Sb6#
- 2.Sxc7#
- 1...Rd7
- 2.Sb6#
- 1...Re7
- 2.Sb6#
- 1...Rb8
- 2.Sc7#
- 1...Se1
- 2.Rd4#
- 2.Qd4#
- 1...Sa3
- 2.Rd4#
- 2.Qd4#
- 2.Qh1#
- 1...Sb4
- 2.Rd4#
- 2.Qd4#
- 2.Qh1#
- 1...Sd4
- 2.Rxd4#
- 2.Qxd4#
- 1...b4
- 2.Bc4#
- 1...g5
- 2.Rxf5#
- 1...Se3!
- 1...c5
- 1.Qe3?
- 1...c5
- 2.Qf3#
- 1...Rb6
- 2.Sxb6#
- 2.Sc7#
- 1...Ra7
- 2.Sb6#
- 1...Rc7
- 2.Sb6#
- 2.Sxc7#
- 1...Rd7
- 2.Sb6#
- 1...Re7
- 2.Sb6#
- 1...Rb8
- 2.Sc7#
- 1...Se1
- 2.Rd4#
- 2.Qd4#
- 1...Sa3
- 2.Rd4#
- 2.Qd4#
- 2.Qf3#
- 1...Sb4
- 2.Rd4#
- 2.Qd4#
- 2.Qf3#
- 1...Sd4
- 2.Rxd4#
- 2.Qxd4#
- 1...b4
- 2.Bc4#
- 1...g5
- 2.Rxf5#
- 1...Sxe3!
- 1...c5
- 1.Bxc2?
- Keys
- 1.Rg4!
- 1...fxg4
- 2.e4#
- 1...c5
- 2.Qf3#
- 1...Rb6
- 2.Sxb6#
- 2.Sc7#
- 1...Ra7
- 2.Sb6#
- 1...Rc7
- 2.Sb6#
- 2.Sxc7#
- 1...Rd7
- 2.Sb6#
- 1...Re7
- 2.Sb6#
- 1...Rb8
- 2.Sc7#
- 1...Se1
- 2.Rd4#
- 2.Qd4#
- 1...Sa3
- 2.Rd4#
- 2.Qd4#
- 2.Qf3#
- 1...Se3
- 2.Qf3#
- 1...Sb4
- 2.Rd4#
- 2.Qd4#
- 2.Qf3#
- 1...Sd4
- 2.Rxd4#
- 2.Qxd4#
- 1...b4
- 2.Bc4#
- 1...f4
- 2.Rg5#
- 1...g5
- 2.Qxf5#
- 1...fxg4
- 1.Rg4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(k);N_GUARD::S(I)
- S(b);::QAB(D)
- P(e);N_GUARD::B(F)
- P(h);SBLOCK::QAB(D)
- P(j);N_GUARD::R(G),XP(g)
- Tries
- Try
- B(F);XS(b)
- Threat
- DUALS(2)
- Vars
- P(c);XB(F)::QAR1(D)
- P(h);SBLOCK::QAB(D)
- Refutation
- S(a);XB(F)
- Try
- B(F);CHECK
- Refutation
- P(g);XB(F)
- Try
- B(F);XP(e)
- Threat
- B(F)
- Vars
- R(k);N_GUARD,XB(F)::S(I)
- P(h);SBLOCK::QAB(D)
- Refutation
- P(h);XB(F)
- Try
- R(A);XS(a)
- Vars
- S(b);N_GUARD,XR(A)::QAR1(D)
- S(b);N_GUARD::QAR1(D),XS(b)
- P(h);SBLOCK::QAB(D)
- R(k);N_GUARD::S(I)
- S(b);N_GUARD::QAR1(D)
- P(e);N_GUARD::B(F)
- P(j);N_GUARD::R(G),XP(g)
- Refutation
- S(b);
- Try
- R(A);
- Vars
- S(b);N_GUARD::QAR1(D),XS(b)
- P(h);SBLOCK::QAB(D)
- R(k);N_GUARD::S(I)
- S(b);N_GUARD::QAR1(D)
- P(e);N_GUARD::B(F)
- P(j);N_GUARD::R(G),XP(g)
- Refutation
- S(b);
- Try
- R(A);
- Threat
- DUALS(2)
- Vars
- S(b);N_GUARD::QAR1(D),XS(b)
- P(h);SBLOCK::QAB(D)
- Refutation
- S(b);
- Try
- R(A);
- Vars
- S(b);N_GUARD,XR(A)::QAR1(D)
- S(b);N_GUARD::QAR1(D),XS(b)
- P(h);SBLOCK::QAB(D)
- R(k);N_GUARD::S(I)
- S(b);N_GUARD::QAR1(D)
- P(e);N_GUARD::B(F)
- P(j);N_GUARD::R(G),XP(g)
- Refutation
- S(b);
- Try
- R(A);
- Vars
- S(b);N_GUARD::QAR1(D),XS(b)
- P(h);SBLOCK::QAB(D)
- R(k);N_GUARD::S(I)
- S(b);N_GUARD::QAR1(D)
- P(e);N_GUARD::B(F)
- P(j);N_GUARD::R(G),XP(g)
- Refutation
- S(b);
- Try
- R(A);
- Vars
- S(b);N_GUARD::QAR1(D),XS(b)
- P(h);SBLOCK::QAB(D)
- R(k);N_GUARD::S(I)
- S(b);N_GUARD::QAR1(D)
- P(e);N_GUARD::B(F)
- P(j);N_GUARD::R(G),XP(g)
- Refutation
- S(b);
- Try
- R(A);
- Vars
- S(b);N_GUARD::QAR1(D),XS(b)
- P(h);SBLOCK::QAB(D)
- R(k);N_GUARD::S(I)
- S(b);N_GUARD::QAR1(D)
- P(e);N_GUARD::B(F)
- P(j);N_GUARD::R(G),XP(g)
- Refutation
- S(b);
- Try
- R(A);XS(b)
- Threat
- DUALS(3)
- Vars
- P(c);XR(A)::QAR1(D)
- P(h);::QAB(D)
- Refutation
- S(a);XR(A)
- Try
- R(G);
- Vars
- P(h);SBLOCK::QAB(D)
- R(k);N_GUARD::S(I)
- S(b);::QAB(D)
- P(g);N_GUARD::B(F)
- P(j);N_GUARD::QAR2(D),XP(g)
- Refutation
- S(b);XR(G)
- Try
- R(G);
- Threat
- QAB(D)
- Vars
- R(k);N_GUARD::S(I)
- Refutation
- P(e);XR(G)
- Try
- R(G);
- Vars
- P(h);SBLOCK::QAB(D)
- R(k);N_GUARD::S(I)
- S(b);::QAB(D)
- P(e);N_GUARD::B(F)
- P(j);N_GUARD::QAR2(D),XP(g)
- Refutation
- P(g);
- Try
- Q(D);
- Vars
- P(h);SBLOCK::QAB(D)
- R(k);N_GUARD::S(I)
- P(e);N_GUARD::B(F)
- P(j);N_GUARD::R(G),XP(g)
- Refutation
- S(b);
- Try
- Q(D);
- Vars
- P(h);SBLOCK::QAB(D)
- R(k);N_GUARD::S(I)
- P(e);N_GUARD::B(F)
- P(j);N_GUARD::R(G),XP(g)
- Refutation
- S(b);XQ(D)
- Try
- Actual
- R(G);
- Vars
- P(g);N_GUARD,XR(G)::P(C)
- P(h);SBLOCK::QAB(D)
- R(k);N_GUARD::S(I)
- S(b);::QAB(D)
- P(e);N_GUARD::B(F)
- P(g);OGATEB::R(G)
- P(j);N_GUARD::QAR2(D),XP(g)
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).