MESON Chess Problem Database
Problem Display
PID: 137290 (1r6/Q2ppB2/b5P1/6RN/p2Nk2n/2Br2R1/q1P5/6bK w - - 0 1)
Ellerman, Arnoldo
Ajedrez Argentino, 1953
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Bd5#
- 1...Qd5
- 2.Bxd5#
- 1...Qa1
- 2.Bd5#
- 1...Qb2
- 2.Bd5#
- 1...Qxc2
- 2.Bd5#
- 1...Qa3
- 2.Bd5#
- 1...Re3
- 2.R3g4#
- 1...Rb3
- 2.Bd5#
- 1...Rb5
- 2.cxd3#
- 1...Bb7
- 2.cxd3#
- 1...Bc8
- 2.cxd3#
- 1...Sxg6
- 2.Bxg6#
- 1...d5
- 2.Qxe7#
- 1...e5
- 2.R5g4#
- 1...Qb1
- Tries
- 1.Sf6+?
- 1...Kf4
- 2.Se2#
- 1...exf6!
- 1...Kf4
- 1.Qxb8?
- threat
- 2.R5g4#
- 2.Re5#
- 2.Qf4#
- 2.Qe5#
- 1...Qxf7
- 2.Re5#
- 2.Qe5#
- 1...Rxc3
- 2.R5g4#
- 2.Qf4#
- 2.Qe5#
- 1...Rxg3
- 2.Re5#
- 2.Qf4#
- 2.Qe5#
- 1...Rxd4
- 2.Re5#
- 2.Qf4#
- 2.Qe5#
- 1...Bxd4
- 2.Qf4#
- 1...Sxg6
- 2.Bxg6#
- 1...Rf3
- 2.Re5#
- 2.Qe5#
- 1...Sf3
- 2.Qf4#
- 1...Qd5
- 2.Bxd5#
- 2.R5g4#
- 2.Qf4#
- 1...Qe6
- 2.Qf4#
- 1...Be3
- 2.Re5#
- 2.Qe5#
- 1...Sg2
- 2.Re5#
- 2.Qe5#
- 1...Sf5
- 2.R5g4#
- 2.Qf4#
- 1...e5
- 2.R5g4#
- 2.Rxe5#
- 2.Qxe5#
- 1...e6
- 2.Sf6#
- 2.Re5#
- 2.Qf4#
- 2.Qe5#
- 1...d6!
- threat
- 1.Qb7+?
- 1...Qd5
- 2.Bxd5#
- 2.Qxd5#
- 1...Bxb7
- 2.cxd3#
- 1...d5
- 2.Qxe7#
- 1...Rxb7!
- 1...Qd5
- 1.Qc7?
- threat
- 2.R5g4#
- 2.Re5#
- 2.Qf4#
- 2.Qe5#
- 1...Qxf7
- 2.Re5#
- 2.Qe5#
- 1...Rxc3
- 2.R5g4#
- 2.Qf4#
- 2.Qe5#
- 1...Rxg3
- 2.Re5#
- 2.Qf4#
- 2.Qe5#
- 1...Rxd4
- 2.Re5#
- 2.Qf4#
- 2.Qe5#
- 1...Bxd4
- 2.Qf4#
- 1...Sxg6
- 2.Bxg6#
- 1...Rf3
- 2.Re5#
- 2.Qe5#
- 1...Sf3
- 2.Qf4#
- 1...Qd5
- 2.Bxd5#
- 2.R5g4#
- 2.Qf4#
- 1...Qe6
- 2.Qf4#
- 1...Rb5
- 2.R5g4#
- 2.Qf4#
- 2.cxd3#
- 1...Be3
- 2.Re5#
- 2.Qe5#
- 1...Sg2
- 2.Re5#
- 2.Qe5#
- 1...Sf5
- 2.R5g4#
- 2.Qf4#
- 1...e5
- 2.R5g4#
- 2.Rxe5#
- 2.Qxe5#
- 1...e6
- 2.Sf6#
- 2.Re5#
- 2.Qf4#
- 2.Qe5#
- 1...d6!
- threat
- 1.Sf6+?
- Keys
- 1.Sb3!
- threat
- 2.Re5#
- 1...Rxc3
- 2.Sd2#
- 2.Bd5#
- 1...Rxg3
- 2.Sd2#
- 2.Bd5#
- 1...Sxg6
- 2.Bxg6#
- 1...Rd4
- 2.Sc5#
- 1...Rd5
- 2.Bxd5#
- 1...Rb5
- 2.cxd3#
- 1...Bd4
- 2.Bd5#
- 1...Sf3
- 2.R3g4#
- 1...Sf5
- 2.R5g4#
- 1...d6
- 2.Qxe7#
- 1...e5
- 2.Rxe5#
- threat
- 1.Sb3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 6
- REMOVED MATES = 11
- Sets
- Q(b);N_GUARD::B(J)
- Q(b);N_GUARD::B(J),XQ(b)
- Q(b);N_GUARD,XP(B)::B(J)
- R(c);SBLOCK::R(D)
- R(j);S_CUTQ(b)::B(J)
- R(j);S_CUTB(g)::P(B),XR(c)
- B(g);N_GUARD::P(B),XR(c)
- S(f);OGATE,XP(H)::B(J),XS(f)
- P(h);OGATE::QAR(I),XP(i)
- P(i);SBLOCK::R(F)
- Tries
- Try
- S(G);CHECK
- Vars
- K(e);P-FLIGHT::S(E)
- Refutation
- P(i);XS(G)
- Try
- Q(I);XR(j)
- Threat
- DUALS(4)
- Vars
- B(a);XS(E)::QAR1(I)
- S(f);OGATE,XP(H)::B(J),XS(f)
- S(f);::QAR1(I)
- Q(b);::QAR1(I)
- Refutation
- P(h);
- Try
- Q(I);CHECK
- Vars
- B(g);XQ(I)::P(B),XR(c)
- P(h);OGATE,P_SPINP(h)::QAR(I),XP(i)
- Refutation
- R(j);XQ(I)
- Try
- Q(I);
- Threat
- DUALS(4)
- Vars
- B(a);XS(E)::QAR1(I)
- S(f);OGATE,XP(H)::B(J),XS(f)
- S(f);::QAR1(I)
- Q(b);::QAR1(I)
- Refutation
- P(h);
- Try
- Actual
- S(E);
- Threat
- R1(F)
- Vars
- S(f);OGATE,XP(H)::B(J),XS(f)
- R(c);S_CUTB(a)::S(E)
- R(c);N_GUARD::B(J),XR(c)
- R(j);S_CUTB(g)::P(B),XR(c)
- B(a);S_CUTR(c)::B(J)
- S(f);SBLOCK::R(D)
- S(f);SBLOCK::R(F)
- P(h);OGATE::QAR(I),XP(i)
- P(i);::R1(F),XP(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).