MESON Chess Problem Database
Problem Display
PID: 21318 (8/8/1K1N1p1p/1p1R1Pn1/1Pb2kPR/3r1p2/3P1N1P/2Q5 w - - 0 1)
Bernard, Henry D'Oyly
3rd Prize, Good Companions (April Complete Blocks), 1918
#2
11 + 8
| 2681 | All Change Here! | 1919 |
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Rxd2
- 2.Qxd2#
- 1...Ra3
- 2.d3#
- 1...Rb3
- 2.d3#
- 1...Rc3
- 2.dxc3#
- 1...Re3
- 2.dxe3#
- 1...Rd4
- 2.d3#
- 1...Rxd5
- 2.d4#
- 1...Ba2
- 2.Sxd3#
- 1...Bb3
- 2.Sxd3#
- 1...Bxd5
- 2.Sxd3#
- 1...Sh3
- 2.Sxh3#
- 1...Se4
- 2.Sh3#
- 1...Se6
- 2.Sh3#
- 1...Sf7
- 2.Sh3#
- 1...Sh7
- 2.Sh3#
- 1...h5
- 2.gxh5#
- 1...Rxd2
- Tries
- 1.Ka5?
- 1...Rxd2
- 2.Qxd2#
- 1...Rxd5
- 2.d4#
- 1...Bxd5
- 2.Sxd3#
- 1...Sh3
- 2.Sxh3#
- 1...Se4
- 2.Sh3#
- 1...Se6
- 2.Sh3#
- 1...Sf7
- 2.Sh3#
- 1...Sh7
- 2.Sh3#
- 1...Rb3
- 2.d3#
- 1...Rc3
- 2.dxc3#
- 1...Re3
- 2.dxe3#
- 1...Rd4
- 2.d3#
- 1...Ba2
- 2.Sxd3#
- 1...Bb3
- 2.Sxd3#
- 1...h5
- 2.gxh5#
- 1...Ra3+!
- 1...Rxd2
- 1.Ka6?
- 1...Rxd2
- 2.Qxd2#
- 1...Rxd5
- 2.d4#
- 1...Bxd5
- 2.Sxd3#
- 1...Sh3
- 2.Sxh3#
- 1...Se4
- 2.Sh3#
- 1...Se6
- 2.Sh3#
- 1...Sf7
- 2.Sh3#
- 1...Sh7
- 2.Sh3#
- 1...Rb3
- 2.d3#
- 1...Rc3
- 2.dxc3#
- 1...Re3
- 2.dxe3#
- 1...Rd4
- 2.d3#
- 1...Ba2
- 2.Sxd3#
- 1...Bb3
- 2.Sxd3#
- 1...h5
- 2.gxh5#
- 1...Ra3+!
- 1...Rxd2
- 1.Kc6?
- 1...Rxd2
- 2.Qxd2#
- 1...Rxd5
- 2.d4#
- 1...Sh3
- 2.Sxh3#
- 1...Se4
- 2.Sh3#
- 1...Se6
- 2.Sh3#
- 1...Sf7
- 2.Sh3#
- 1...Sh7
- 2.Sh3#
- 1...Ra3
- 2.d3#
- 1...Rb3
- 2.d3#
- 1...Rc3
- 2.dxc3#
- 1...Re3
- 2.dxe3#
- 1...Rd4
- 2.d3#
- 1...Ba2
- 2.Sxd3#
- 1...Bb3
- 2.Sxd3#
- 1...h5
- 2.gxh5#
- 1...Bxd5+!
- 1...Rxd2
- 1.Ka7?
- 1...Rxd2
- 2.Qxd2#
- 1...Rxd5
- 2.d4#
- 1...Bxd5
- 2.Sxd3#
- 1...Sh3
- 2.Sxh3#
- 1...Se4
- 2.Sh3#
- 1...Se6
- 2.Sh3#
- 1...Sf7
- 2.Sh3#
- 1...Sh7
- 2.Sh3#
- 1...Rb3
- 2.d3#
- 1...Rc3
- 2.dxc3#
- 1...Re3
- 2.dxe3#
- 1...Rd4
- 2.d3#
- 1...Ba2
- 2.Sxd3#
- 1...Bb3
- 2.Sxd3#
- 1...h5
- 2.gxh5#
- 1...Ra3+!
- 1...Rxd2
- 1.Kb7?
- 1...Rxd2
- 2.Qxd2#
- 1...Rxd5
- 2.d4#
- 1...Sh3
- 2.Sxh3#
- 1...Se4
- 2.Sh3#
- 1...Se6
- 2.Sh3#
- 1...Sf7
- 2.Sh3#
- 1...Sh7
- 2.Sh3#
- 1...Ra3
- 2.d3#
- 1...Rb3
- 2.d3#
- 1...Rc3
- 2.dxc3#
- 1...Re3
- 2.dxe3#
- 1...Rd4
- 2.d3#
- 1...Ba2
- 2.Sxd3#
- 1...Bb3
- 2.Sxd3#
- 1...h5
- 2.gxh5#
- 1...Bxd5+!
- 1...Rxd2
- 1.Kc7?
- 1...Rxd2
- 2.Qxd2#
- 1...Rxd5
- 2.d4#
- 1...Bxd5
- 2.Sxd3#
- 1...Sh3
- 2.Sxh3#
- 1...Se4
- 2.Sh3#
- 1...Sf7
- 2.Sh3#
- 1...Sh7
- 2.Sh3#
- 1...Ra3
- 2.d3#
- 1...Rb3
- 2.d3#
- 1...Rc3
- 2.dxc3#
- 1...Re3
- 2.dxe3#
- 1...Rd4
- 2.d3#
- 1...Ba2
- 2.Sxd3#
- 1...Bb3
- 2.Sxd3#
- 1...h5
- 2.gxh5#
- 1...Se6+!
- 1...Rxd2
- 1.Sf7?
- 1...Rxd2
- 2.Qxd2#
- 1...Rxd5
- 2.d3#
- 2.d4#
- 1...Bxd5
- 2.Qc7#
- 1...Ra3
- 2.d3#
- 1...Rb3
- 2.d3#
- 1...Rc3
- 2.dxc3#
- 1...Re3
- 2.dxe3#
- 1...Rd4
- 2.d3#
- 1...Ba2
- 2.Qc7#
- 1...Bb3
- 2.Qc7#
- 1...Sh3
- 2.g5#
- 1...Se4
- 2.Sh3#
- 2.g5#
- 1...Se6
- 2.g5#
- 1...Sh7
- 2.g5#
- 1...h5
- 2.gxh5#
- 1...Sxf7!
- 1...Rxd2
- 1.Rc5?
- 1...Rxd2
- 2.Qxd2#
- 1...Rd5
- 2.d4#
- 1...Bd5
- 2.Sxd3#
- 1...Sh3
- 2.Sxh3#
- 1...Se4
- 2.Sh3#
- 1...Se6
- 2.Sh3#
- 1...Sf7
- 2.Sh3#
- 1...Sh7
- 2.Sh3#
- 1...Ra3
- 2.d3#
- 1...Rb3
- 2.d3#
- 1...Rc3
- 2.dxc3#
- 1...Re3
- 2.dxe3#
- 1...Rd4
- 2.d3#
- 1...Ba2
- 2.Sxd3#
- 1...Bb3
- 2.Sxd3#
- 1...Be6
- 2.Sxd3#
- 1...Bf7
- 2.Sxd3#
- 1...Bg8
- 2.Sxd3#
- 1...h5
- 2.gxh5#
- 1...Rxd6+!
- 1...Rxd2
- 1.Qg1?
- threat
- 2.Qg3#
- 1...Sh3
- 2.Sxh3#
- 2.g5#
- 1...Se4
- 2.Sh3#
- 2.g5#
- 1...Se6
- 2.Sh3#
- 2.g5#
- 1...Sf7
- 2.Sh3#
- 2.g5#
- 1...Sh7
- 2.Sh3#
- 2.g5#
- 1...Rxd2!
- threat
- 1.Qc3?
- 1...Rxd2
- 2.Qxd2#
- 1...Rxd5
- 2.Qe3#
- 1...Bxd5
- 2.Sxd3#
- 1...Sh3
- 2.Sxh3#
- 1...Se4
- 2.Sh3#
- 1...Se6
- 2.Sh3#
- 1...Sf7
- 2.Sh3#
- 1...Sh7
- 2.Sh3#
- 1...Re3
- 2.Qxe3#
- 2.dxe3#
- 1...Rd4
- 2.Qe3#
- 1...Ba2
- 2.Sxd3#
- 1...Bb3
- 2.Sxd3#
- 1...h5
- 2.gxh5#
- 1...Rxc3!
- 1...Rxd2
- 1.Qxc4+?
- 1...Rd4
- 2.Sd3#
- 1...Se4
- 2.Sh3#
- 1...bxc4!
- 1...Rd4
- 1.Ka5?
- Keys
- 1.Sde4!
- 1...Rxd2
- 2.Qxd2#
- 1...Rxd5
- 2.d4#
- 1...Bxd5
- 2.Qc7#
- 1...Sxe4
- 2.Sh3#
- 1...Ra3
- 2.d3#
- 1...Rb3
- 2.d3#
- 1...Rc3
- 2.dxc3#
- 1...Re3
- 2.dxe3#
- 1...Rd4
- 2.d3#
- 1...Ba2
- 2.Qc7#
- 1...Bb3
- 2.Qc7#
- 1...Sh3
- 2.g5#
- 1...Se6
- 2.g5#
- 1...Sf7
- 2.g5#
- 1...Sh7
- 2.g5#
- 1...h5
- 2.gxh5#
- 1...Rxd2
- 1.Sde4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 7
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(a);OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
- R(a);OGATE::QAB(A)+P(B)
- R(a);OGATE::QAB(A)+P(B),XR(a)
- R(a);OGATE::P(B),XR(a)
- R(a);OGATE,XR(H)::QAB(A)+P(B)
- B(c);N_GUARD::S(C),XR(a)
- B(c);N_GUARD,XR(H)::S(C),XR(a)
- S(f);N_GUARD::S(C),XS(f)
- S(f);N_GUARD::S(C)
- P(h);OGATE::R(G)+P(F),XP(h)
- Tries
- Try
- K(J);S_FLIGHT
- Vars
- R(a);OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
- R(a);OGATE,XR(H)::QAB(A)+P(B)
- B(c);N_GUARD,XR(H)::S(C),XR(a)
- S(f);N_GUARD::S(C),XS(f)
- S(f);N_GUARD::S(C)
- R(a);OGATE::QAB(A)+P(B)
- R(a);OGATE::QAB(A)+P(B),XR(a)
- R(a);OGATE::P(B),XR(a)
- B(c);N_GUARD::S(C),XR(a)
- P(h);OGATE::R(G)+P(F),XP(h)
- Refutation
- R(a);CHECK
- Try
- K(J);P-FLIGHT
- Vars
- R(a);OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
- R(a);OGATE,XR(H)::QAB(A)+P(B)
- B(c);N_GUARD,XR(H)::S(C),XR(a)
- S(f);N_GUARD::S(C),XS(f)
- S(f);N_GUARD::S(C)
- R(a);OGATE::QAB(A)+P(B)
- R(a);OGATE::QAB(A)+P(B),XR(a)
- R(a);OGATE::P(B),XR(a)
- B(c);N_GUARD::S(C),XR(a)
- P(h);OGATE::R(G)+P(F),XP(h)
- Refutation
- R(a);CHECK
- Try
- K(J);P-FLIGHT
- Vars
- R(a);OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
- R(a);OGATE,XR(H)::QAB(A)+P(B)
- S(f);N_GUARD::S(C),XS(f)
- S(f);N_GUARD::S(C)
- R(a);OGATE::QAB(A)+P(B)
- R(a);OGATE::QAB(A)+P(B),XR(a)
- R(a);OGATE::P(B),XR(a)
- B(c);N_GUARD::S(C),XR(a)
- P(h);OGATE::R(G)+P(F),XP(h)
- Refutation
- B(c);CHECK,XR(H)
- Try
- K(J);S_FLIGHT
- Vars
- R(a);OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
- R(a);OGATE,XR(H)::QAB(A)+P(B)
- B(c);N_GUARD,XR(H)::S(C),XR(a)
- S(f);N_GUARD::S(C),XS(f)
- S(f);N_GUARD::S(C)
- R(a);OGATE::QAB(A)+P(B)
- R(a);OGATE::QAB(A)+P(B),XR(a)
- R(a);OGATE::P(B),XR(a)
- B(c);N_GUARD::S(C),XR(a)
- P(h);OGATE::R(G)+P(F),XP(h)
- Refutation
- R(a);CHECK
- Try
- K(J);P-FLIGHT
- Vars
- R(a);OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
- R(a);OGATE,XR(H)::QAB(A)+P(B)
- S(f);N_GUARD::S(C),XS(f)
- S(f);N_GUARD::S(C)
- R(a);OGATE::QAB(A)+P(B)
- R(a);OGATE::QAB(A)+P(B),XR(a)
- R(a);OGATE::P(B),XR(a)
- B(c);N_GUARD::S(C),XR(a)
- P(h);OGATE::R(G)+P(F),XP(h)
- Refutation
- B(c);CHECK,XR(H)
- Try
- K(J);S_FLIGHT
- Vars
- R(a);OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
- R(a);OGATE,XR(H)::QAB(A)+P(B)
- B(c);N_GUARD,XR(H)::S(C),XR(a)
- S(f);N_GUARD::S(C),XS(f)
- S(f);N_GUARD::S(C)
- R(a);OGATE::QAB(A)+P(B)
- R(a);OGATE::QAB(A)+P(B),XR(a)
- R(a);OGATE::P(B),XR(a)
- B(c);N_GUARD::S(C),XR(a)
- P(h);OGATE::R(G)+P(F),XP(h)
- Refutation
- S(f);CHECK
- Try
- S(K);
- Vars
- R(a);OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
- B(c);OGATE,XR(H)::QAB(A)
- R(a);OGATE::QAB(A)+P(B)
- R(a);OGATE::QAB(A)+P(B),XR(a)
- R(a);OGATE::P(B),XR(a)
- B(c);OGATE::QAB(A)
- S(f);OGATE::R(G)+P(F)
- P(h);OGATE::R(G)+P(F),XP(h)
- Refutation
- S(f);XS(K)
- Try
- R(H);
- Vars
- R(a);OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
- R(a);OGATE::QAB(A)+P(B)
- B(c);N_GUARD::S(C),XR(a)
- S(f);N_GUARD::S(C),XS(f)
- S(f);N_GUARD::S(C)
- R(a);OGATE::QAB(A)+P(B),XR(a)
- R(a);OGATE::P(B),XR(a)
- P(h);OGATE::R(G)+P(F),XP(h)
- Refutation
- R(a);CHECK,XS(K)
- Try
- Q(A);
- Threat
- QAB1(A)
- Refutation
- R(a);XP(B)
- Try
- Q(A);
- Vars
- R(a);OGATE,XP(B)::QAB(A),XR(a)
- R(a);OGATE,XR(H)::QAB1(A)
- B(c);N_GUARD,XR(H)::S(C),XR(a)
- S(f);N_GUARD::S(C),XS(f)
- S(f);N_GUARD::S(C)
- R(a);OGATE::QAB1(A)
- B(c);N_GUARD::S(C),XR(a)
- P(h);OGATE::R(G)+P(F),XP(h)
- Refutation
- R(a);XQ(A)
- Try
- Q(A);CHECK,XB(c)
- Vars
- R(a);P_SPINR(a)::S(C)
- S(f);P_SPINS(f)::S(C)
- Refutation
- P(e);XQ(A)
- Try
- Actual
- S(K);
- Vars
- R(a);OGATE,P_SPINR(a),XP(B)::QAB(A),XR(a)
- R(a);OGATE,XR(H)::QAB(A)+P(B)
- B(c);OGATE,XR(H)::QAB(A)
- S(f);N_GUARD,SBLOCK,XS(K)::S(C)
- R(a);OGATE::QAB(A)+P(B)
- R(a);OGATE::QAB(A)+P(B),XR(a)
- R(a);OGATE::P(B),XR(a)
- B(c);OGATE::QAB(A)
- S(f);OGATE::R(G)+P(F)
- P(h);OGATE::R(G)+P(F),XP(h)
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).