MESON Chess Problem Database
Problem Display
PID: 139334 (K2R4/8/1p6/4pN2/PpkPNp1p/6rR/P3bQ2/1B2B1n1 w - - 0 1)
Ellerman, Arnoldo
Els Escacs a Catalunya, 1934
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Rg2
- 2.Sd2#
- 1...Ra3
- 2.Sd2#
- 1...Rb3
- 2.Sd2#
- 2.axb3#
- 1...Rc3
- 2.Sd2#
- 1...Rg4
- 2.Sd2#
- 1...Rg5
- 2.Sd2#
- 1...Rg6
- 2.Sd2#
- 1...Rg7
- 2.Sd2#
- 1...Rg8
- 2.Sd2#
- 1...Bf3
- 2.Qc2#
- 1...Sf3
- 2.Qxe2#
- 1...f3
- 2.Se3#
- 1...exd4
- 2.Rxd4#
- 2.Qxd4#
- 1...Rg2
- Tries
- 1.Sf6?
- threat
- 2.Sd6#
- 2.Rc8#
- 1...exd4
- 2.Rc8#
- 2.Qxd4#
- 1...Re3
- 2.Rc8#
- 1...Rg7
- 2.Sd6#
- 1...Rg8
- 2.Sd6#
- 1...Bf3+!
- threat
- 1.Se3+?
- 1...fxe3
- 2.Qf7#
- 1...Rxe3!
- 1...fxe3
- 1.Se7?
- threat
- 2.Sd6#
- 2.Rc8#
- 1...exd4
- 2.Rxd4#
- 2.Rc8#
- 2.Qxd4#
- 1...Rg6
- 2.Sd2#
- 1...Rg8
- 2.Sd2#
- 2.Sd6#
- 1...Bf3
- 2.Rc8#
- 2.Qc2#
- 1...Bg4
- 2.Sd6#
- 1...Re3!
- threat
- 1.Rxg3?
- threat
- 2.Sd2#
- 1...fxg3
- 2.Se3#
- 1...exd4
- 2.Rxd4#
- 2.Qxd4#
- 1...Bd3
- 2.Bxd3#
- 1...Bf3
- 2.Qc2#
- 1...Sf3
- 2.Qxe2#
- 1...b3
- 2.axb3#
- 1...f3
- 2.Se3#
- 1...hxg3!
- threat
- 1.Qxg3?
- threat
- 2.Sd2#
- 2.Qb3#
- 2.Qg8#
- 1...fxg3
- 2.Se3#
- 1...exd4
- 2.Rxd4#
- 2.Qb3#
- 2.Qg8#
- 1...Bd1
- 2.Sd2#
- 2.Bd3#
- 2.Qd3#
- 2.Qg8#
- 1...Bd3
- 2.Bxd3#
- 2.Qxd3#
- 2.Qg8#
- 1...Bf3
- 2.Qg8#
- 1...Bg4
- 2.Sd2#
- 2.Bd3#
- 2.Qb3#
- 2.Qd3#
- 1...Bh5
- 2.Sd2#
- 2.Bd3#
- 2.Qb3#
- 2.Qd3#
- 1...Sf3
- 2.Qg8#
- 1...b3
- 2.Qxb3#
- 2.Qc3#
- 2.Qg8#
- 2.axb3#
- 1...f3
- 2.Se3#
- 2.Qg8#
- 1...hxg3!
- threat
- 1.Qxe2+?
- 1...Rd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Sxe2!
- 1...Rd3
- 1.dxe5?
- threat
- 2.Rd4#
- 2.Qd4#
- 1...Re3
- 2.Rd4#
- 1...Rg8
- 2.Sd2#
- 2.Qd4#
- 1...Sf3
- 2.Qxe2#
- 1...Rd3!
- threat
- 1.Sf6?
- Keys
- 1.Qg2!
- threat
- 2.Sed6#
- 1...Rxg2
- 2.Sd2#
- 1...exd4
- 2.Rxd4#
- 1...Rf3
- 2.Qg8#
- 1...Rg6
- 2.Sd2#
- 1...Bf3
- 2.Qc2#
- 1...Sf3
- 2.Qxe2#
- 1...f3
- 2.Se3#
- threat
- 1.Qg2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- R(c);::S(H)
- R(c);P_PINP(F)::S(H)
- R(c);P_PINR(K)::S(H)
- B(b);OGATE,P_PINS(H)::QAR2(D)
- S(a);N_GUARD,S_CUTR(c)::QAB(D),XB(b)
- P(f);N_GUARD,S_CUTR(c)::S(I)
- Tries
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- R(c);::R(K)
- R(c);::S(I)
- R(c);P_PINR(K)::S(I)
- Refutation
- B(b);CHECK
- Try
- S(I);CHECK
- Vars
- P(f);OGATE,XS(I)::QAB(D)
- Refutation
- R(c);XS(I)
- Try
- S(I);
- Threat
- DUALS(2)
- Vars
- R(c);::S(H)
- B(b);::S(H)
- Refutation
- R(c);
- Try
- R(E);XR(c)
- Threat
- S(H)
- Vars
- P(f);N_GUARD,XR(E)::S(I)
- B(b);N_GUARD::B(A),XB(b)
- B(b);OGATE,P_PINS(H)::QAR2(D)
- S(a);N_GUARD::QAB(D),XB(b)
- P(d);OGATE::P(C),XP(d)
- P(f);N_GUARD::S(I)
- Refutation
- P(g);XR(E)
- Try
- Q(D);XR(c)
- Threat
- DUALS(3)
- Vars
- P(f);N_GUARD,XQ(D)::S(I)
- B(b);P_PINS(H)::QAB(D)
- S(a);::QAB(D)
- Refutation
- P(g);XQ(D)
- Try
- Q(D);CHECK,XB(b)
- Refutation
- S(a);XQ(D)
- Try
- P(G);XP(h)
- Threat
- DUALS(2)
- Vars
- R(c);::R1(K)
- S(a);N_GUARD,S_CUTR(c)::QAB(D),XB(b)
- Refutation
- R(c);
- Try
- Actual
- Q(D);
- Threat
- S(H)
- Vars
- R(c);XQ(D)::S(H)
- P(h);OGATE,XP(G)::R1(K),XP(h)
- R(c);OGATE::QAB(D)
- R(c);::S(H)
- B(b);OGATE,P_PINS(H)::QAR2(D)
- S(a);N_GUARD,S_CUTR(c)::QAB(D),XB(b)
- P(f);N_GUARD,S_CUTR(c)::S(I)
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).