MESON Chess Problem Database
Problem Display
PID: 71352 (8/1p6/1P3p2/1QPKnP2/N1r1R3/1pPkP3/1R1rp3/N1B1b3 w - - 0 1)
Boros, Sandor
4th Prize, Chemnitzer Wochenschach (Allgemeine Zeitung Chemnitz), 1926
#2
12 + 9
SOLUTION
- SOUND
- Sets
- 1...Rd1
- 2.Rd4#
- 1...Rxb2
- 2.Rd4#
- 1...Rc2
- 2.Rd4#
- 1...Bf2
- 2.Rxd2#
- 1...Bg3
- 2.Rxd2#
- 1...Bh4
- 2.Rxd2#
- 1...Sf3
- 2.Qxc4#
- 1...Sg4
- 2.Qxc4#
- 1...Sc6
- 2.Qxc4#
- 1...Sg6
- 2.Qxc4#
- 1...Sd7
- 2.Qxc4#
- 1...Sf7
- 2.Qxc4#
- 1...Rd1
- Tries
- 1.Sc2?
- threat
- 2.Sxe1#
- 2.Sb4#
- 2.Rd4#
- 1...Rxc2
- 2.Rd4#
- 1...Rd1
- 2.Sb4#
- 2.Rd4#
- 1...Bf2
- 2.Sb4#
- 2.Rd4#
- 1...Bg3
- 2.Sb4#
- 2.Rd4#
- 1...Bh4
- 2.Sb4#
- 2.Rd4#
- 1...Sf3
- 2.Sb4#
- 2.Qxc4#
- 1...Sc6
- 2.Sxe1#
- 2.Qxc4#
- 1...bxc2!
- threat
- 1.Sxb3?
- 1...Rd1
- 2.Rd4#
- 1...Rc2
- 2.Rd4#
- 1...Bf2
- 2.Rxd2#
- 1...Bg3
- 2.Rxd2#
- 1...Bh4
- 2.Rxd2#
- 1...Sf3
- 2.Qxc4#
- 1...Sg4
- 2.Qxc4#
- 1...Sc6
- 2.Qxc4#
- 1...Sg6
- 2.Qxc4#
- 1...Sd7
- 2.Qxc4#
- 1...Sf7
- 2.Qxc4#
- 1...Rxb2!
- 1...Rd1
- 1.Bxd2?
- threat
- 2.Rd4#
- 1...Sf3
- 2.Qxc4#
- 1...Sc6
- 2.Qxc4#
- 1...Bxd2!
- threat
- 1.Rc2?
- threat
- 2.Sb2#
- 1...Rxc2
- 2.Rd4#
- 1...b2
- 2.Sxb2#
- 1...bxc2!
- threat
- 1.Qa6?
- 1...Rxb2
- 2.Rd4#
- 1...Bf2
- 2.Rxd2#
- 1...Rd1
- 2.Rd4#
- 1...Rc2
- 2.Rd4#
- 1...Bg3
- 2.Rxd2#
- 1...Bh4
- 2.Rxd2#
- 1...Sf3
- 2.Qxc4#
- 1...Sg4
- 2.Qxc4#
- 1...Sc6
- 2.Qxc4#
- 1...Sg6
- 2.Qxc4#
- 1...Sd7
- 2.Qxc4#
- 1...Sf7
- 2.Qxc4#
- 1...bxa6!
- 1...Rxb2
- 1.c6?
- 1...Rxb2
- 2.Rd4#
- 1...Sxc6
- 2.Qxc4#
- 1...Bf2
- 2.Rxd2#
- 1...Rd1
- 2.Rd4#
- 1...Rc2
- 2.Rd4#
- 1...Bg3
- 2.Rxd2#
- 1...Bh4
- 2.Rxd2#
- 1...Sf3
- 2.Qxc4#
- 1...Sg4
- 2.Qxc4#
- 1...Sg6
- 2.Qxc4#
- 1...Sd7
- 2.Qxc4#
- 1...Sf7
- 2.Qxc4#
- 1...bxc6+!
- 1...Rxb2
- 1.Sc2?
- Keys
- 1.Qxb3!
- 1...Rd4+
- 2.cxd4#
- 1...Rxc5+
- 2.Sxc5#
- 1...Rxb2
- 2.Sxb2#
- 1...Rxc3
- 2.Qxc3#
- 1...Rxa4
- 2.c4#
- 1...Rxe4
- 2.c4#
- 1...Bf2
- 2.Rxd2#
- 1...Rd1
- 2.Qc2#
- 1...Rc2
- 2.Qxc2#
- 1...Rb4
- 2.cxb4#
- 1...Bg3
- 2.Rxd2#
- 1...Bh4
- 2.Rxd2#
- 1...Sf3
- 2.Qxc4#
- 1...Sg4
- 2.Qxc4#
- 1...Sc6
- 2.Qxc4#
- 1...Sg6
- 2.Qxc4#
- 1...Sd7
- 2.Qxc4#
- 1...Sf7
- 2.Qxc4#
- 1...Rd4+
- 1.Qxb3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 6
- REMOVED MATES = 0
- Sets
- R(b);::R1(G)
- R(b);XR(C)::R1(G)
- B(a);N_GUARD::R1(C),XR(b)
- S(g);N_GUARD::QAB1(H),XR(f)
- Tries
- Try
- S(A);
- Threat
- DUALS(3)
- Vars
- R(b);XS(A)::R1(G)
- Refutation
- P(d);XS(A)
- Try
- S(A);XP(d)
- Vars
- R(b);::R1(G)
- B(a);N_GUARD::R1(C),XR(b)
- S(g);N_GUARD::QAB1(H),XR(f)
- Refutation
- R(b);XR(C)
- Try
- B(B);XR(b)
- Threat
- R1(G)
- Vars
- S(g);N_GUARD::QAB1(H),XR(f)
- Refutation
- B(a);XB(B)
- Try
- R(C);
- Threat
- S(F)
- Vars
- R(b);XR(C)::R1(G)
- P(d);::S(F),XP(d)
- Refutation
- P(d);XR(C)
- Try
- Q(H);
- Vars
- R(b);XR(C)::R1(G)
- B(a);N_GUARD::R1(C),XR(b)
- R(b);::R1(G)
- S(g);N_GUARD::QAB1(H),XR(f)
- Refutation
- P(i);N_SPINR(f),XQ(H)
- Try
- P(I);
- Vars
- R(b);XR(C)::R1(G)
- S(g);N_GUARD,XP(I)::QAB1(H),XR(f)
- B(a);N_GUARD::R1(C),XR(b)
- R(b);::R1(G)
- S(g);N_GUARD::QAB1(H),XR(f)
- Refutation
- P(i);CHECK,XP(I)
- Try
- Actual
- Q(H);N_PINR(f),XP(d)
- Vars
- R(f);CHECK,OGATE::QAR(H)+P(D),XR(f)
- R(f);CHECK,XP(I)::S(F),XR(f)
- R(b);XR(C)::S(F),XR(b)
- R(f);OGATE,P_SPINR(f),XP(D)::QAR1(H),XR(f)
- R(f);OGATE,XS(F)::QAR(H)+P(D)
- R(f);OGATE,XR(G)::QAR(H)+P(D)
- B(a);N_GUARD::R1(C),XR(b)
- R(b);N_GUARD::QAB1(H)
- R(b);N_GUARD::QAB1(H),XR(b)
- R(f);OGATE::QAR(H)+P(D),XR(f)
- S(g);N_GUARD::QAB1(H),XR(f)
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).