MESON Chess Problem Database
Problem Display
PID: 64849 (3K4/8/bN1k4/1nR1pP2/B3r1p1/pNb2p2/3q4/3R2Q1 w - - 0 1)
Roura, Juan R
Good Companions (August), 1921
#2
8 + 10
| 3132 | The Good Companion Two-Mover | 1922 |
SOLUTION
- SOUND
- Sets
- 1...Qd4
- 2.Sc4#
- 1...Qd5
- 2.Rdxd5#
- 1...Re1
- 2.Sc4#
- 1...Re2
- 2.Sc4#
- 1...Re3
- 2.Sc4#
- 1...Rc4
- 2.Sxc4#
- 1...Bd4
- 2.Sc4#
- 1...Bc8
- 2.Sxc8#
- 1...Sd4
- 2.Rd5#
- 1...Sc7
- 2.Rc6#
- 1...Qd4
- Tries
- 1.Sxd2?
- threat
- 2.Sdc4#
- 2.Sxe4#
- 1...Rxa4
- 2.Sdc4#
- 2.Se4#
- 1...Re3
- 2.Se4#
- 1...Rd4
- 2.Se4#
- 1...Bd4
- 2.Sxe4#
- 1...Sd4
- 2.Sxe4#
- 2.Rd5#
- 1...f2
- 2.Sxe4#
- 1...Re1
- 2.Sdc4#
- 2.Se4#
- 2.Sbc4#
- 1...Re2
- 2.Sdc4#
- 2.Se4#
- 2.Sbc4#
- 1...Rb4
- 2.Sdc4#
- 2.Se4#
- 1...Rc4
- 2.Sdxc4#
- 2.Se4#
- 2.Sbxc4#
- 1...Rf4
- 2.Sdc4#
- 2.Se4#
- 1...Bxd2!
- threat
- 1.Bxb5?
- threat
- 2.Rc6#
- 1...Bxb5
- 2.Sc8#
- 1...Rc4
- 2.Sxc4#
- 1...Bb7!
- threat
- 1.Rxd2+?
- 1...Rd4
- 2.Sc4#
- 1...Bd4
- 2.Sc4#
- 1...Sd4
- 2.Rd5#
- 2.Rc6#
- 1...Bxd2!
- 1...Rd4
- 1.Rd5+?
- 1...Qxd5
- 2.Qc5#
- 1...Kc6!
- 1...Qxd5
- 1.Qe3?
- threat
- 2.Qh6#
- 1...Rxe3
- 2.Sc4#
- 1...Rd4
- 2.Qxe5#
- 1...Bd4
- 2.Sc4#
- 1...Bc8
- 2.Sxc8#
- 1...Sd4
- 2.Rd5#
- 1...Sc7
- 2.Rc6#
- 1...Rf4!
- threat
- 1.Qd4+?
- 1...Qxd4
- 2.Sc4#
- 1...Bxd4
- 2.Sc4#
- 1...Sxd4
- 2.Rd5#
- 1...exd4
- 2.Sc4#
- 1...Rxd4!
- 1...Qxd4
- 1.Qh1?
- threat
- 2.Qh6#
- 1...Bd4
- 2.Sc4#
- 1...Bc8
- 2.Sxc8#
- 1...Sd4
- 2.Rd5#
- 1...Sc7
- 2.Rc6#
- 1...Rd4!
- threat
- 1.Qxg4?
- threat
- 2.Qg6#
- 1...Bc8
- 2.Sxc8#
- 1...Sd4
- 2.Rd5#
- 1...Sc7
- 2.Rc6#
- 1...Rxg4!
- threat
- 1.Sxd2?
- Keys
- 1.Qh2!
- threat
- 2.Qh6#
- 1...Rd4
- 2.Qxe5#
- 1...Bd4
- 2.Sc4#
- 1...Bc8
- 2.Sxc8#
- 1...Sd4
- 2.Rd5#
- 1...Sc7
- 2.Rc6#
- threat
- 1.Qh2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 6
- Sets
- Q(a);S_CUTR(e)::S(G)
- Q(a);OGATE::R1(A),XQ(a)
- R(e);N_GUARD::S(G)
- R(e);N_GUARD::S(G),XR(e)
- B(c);N_SPINQ(a),S_CUTR(e)::S(G)
- B(i);N_GUARD::S(G),XB(i)
- S(g);N_SPINQ(a),S_CUTQ(a)::R1(E)
- S(g);::R1(E)
- Tries
- Try
- S(C);XQ(a)
- Threat
- DUALS(2)
- Vars
- R(e);::R(A)+S(C),DCHECK
- R(e);::S(C)
- B(c);::S(C),XR(e)
- P(d);::R(A)+S(C),DCHECK,XR(e)
- Refutation
- B(c);P_SPINB(c),XS(C)
- Try
- B(D);XS(g)
- Threat
- R1(E)
- Vars
- B(i);N_GUARD,XB(D)::S(G)
- R(e);N_GUARD::S(G),XR(e)
- Refutation
- B(i);
- Try
- R(A);CHECK,XQ(a)
- Vars
- R(e);P_SPINR(e)::S(G)
- B(c);P_SPINB(c)::S(G)
- Refutation
- B(c);XR(A)
- Try
- R(E);CHECK,N_PINQ(a)
- Vars
- Q(a);P_SPINQ(a),XR(E)::QAB1(B)
- Refutation
- K(j);P-FLIGHT,P_PINR(E),P_SPINS(g)
- Try
- Q(B);
- Threat
- QAR(B)
- Vars
- R(e);N_GUARD,XQ(B)::S(G)
- R(e);N_SPINQ(a),OGATE::QAB1(B),XP(h)
- B(c);N_SPINQ(a),S_CUTR(e)::S(G)
- B(i);N_GUARD::S(G),XB(i)
- S(g);N_SPINQ(a),S_CUTQ(a)::R1(E)
- S(g);::R1(E)
- Refutation
- R(e);
- Try
- Q(B);CHECK,N_PINQ(a)
- Vars
- Q(a);P_SPINQ(a),XQ(B)::S(G)
- B(c);XQ(B)::S(G)
- S(g);XQ(B)::R1(E)
- P(h);XQ(B)::S(G)
- Refutation
- R(e);XQ(B)
- Try
- Q(B);
- Threat
- QAR(B)
- Vars
- B(c);N_SPINQ(a),S_CUTR(e)::S(G)
- B(i);N_GUARD::S(G),XB(i)
- S(g);N_SPINQ(a),S_CUTQ(a)::R1(E)
- S(g);::R1(E)
- Refutation
- R(e);N_SPINQ(a)
- Try
- Q(B);XP(f)
- Threat
- QAR(B)
- Vars
- B(i);N_GUARD::S(G),XB(i)
- S(g);N_SPINQ(a),S_CUTQ(a)::R1(E)
- S(g);::R1(E)
- Refutation
- R(e);XQ(B)
- Try
- Actual
- Q(B);P_PINP(h)
- Threat
- QAR(B)
- Vars
- R(e);N_GUARD,N_SPINQ(a),S_CUTB(c)::QAB1(B),XP(h)
- B(c);N_SPINQ(a),S_CUTR(e)::S(G)
- B(i);N_GUARD::S(G),XB(i)
- S(g);N_SPINQ(a),S_CUTQ(a)::R1(E)
- S(g);::R1(E)
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).