MESON Chess Problem Database
Problem Display
PID: 234377 (3b4/p1RN1K2/q3p1N1/n1Bk4/r3p1r1/3p4/5Q2/2R4B w - - 0 1)
Ellerman, Arnoldo
Problemas, 1953
#2
8 + 10
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Qd4#
- 1...Ra2
- 2.Qd4#
- 1...Ra3
- 2.Qd4#
- 1...Rd4
- 2.Qxd4#
- 1...Rg1
- 2.Sf4#
- 1...Rg2
- 2.Sf4#
- 1...Rg3
- 2.Sf4#
- 1...Rf4+
- 2.Sxf4#
- 1...Rg5
- 2.Sf4#
- 1...Bf6
- 2.Sxf6#
- 1...Bxc7
- 2.Se7#
- 1...Be7
- 2.Sxe7#
- 1...Sc4
- 2.Qd4#
- 1...Ra1
- Tries
- 1.Be7?
- threat
- 2.Sf6#
- 2.R1c5#
- 2.R7c5#
- 2.Qc5#
- 1...Rf4+
- 2.Sxf4#
- 1...Rxg6
- 2.R1c5#
- 2.R7c5#
- 2.Qc5#
- 1...Bxc7
- 2.Sf6#
- 2.Rc5#
- 2.Qc5#
- 1...Qc4
- 2.Sf6#
- 1...Qb5
- 2.Sf6#
- 1...Qc8
- 2.Sf6#
- 2.R1c5#
- 2.Qc5#
- 1...Qb6
- 2.Sf6#
- 1...Qc6
- 2.Sf6#
- 1...Qd6
- 2.Sf6#
- 1...Rc4
- 2.Sf6#
- 1...Rd4
- 2.Sf6#
- 2.R1c5#
- 2.R7c5#
- 1...Sb3
- 2.Sf6#
- 1...Sc4
- 2.Sf6#
- 2.Rc5#
- 2.Qc5#
- 1...Sc6
- 2.Sf6#
- 2.Rc5#
- 2.Qc5#
- 1...Sb7
- 2.Sf6#
- 1...e5
- 2.R1c5#
- 2.R7c5#
- 2.Qc5#
- 1...Bxe7!
- threat
- 1.Qh2?
- threat
- 2.Qe5#
- 1...Rf4+
- 2.Sxf4#
- 1...Bxc7
- 2.Se7#
- 1...Qd6
- 2.Qxd6#
- 1...Rg3
- 2.Sf4#
- 1...Rg5
- 2.Sf4#
- 1...Bf6
- 2.Sxf6#
- 1...Sc6
- 2.Qd6#
- 1...e5
- 2.Qxe5#
- 1...Sc4!
- threat
- 1.Qf4?
- threat
- 2.Qe5#
- 1...Rxf4+
- 2.Sxf4#
- 1...Bxc7
- 2.Se7#
- 1...Qd6
- 2.Qxd6#
- 1...Bf6
- 2.Sxf6#
- 1...Sc4
- 2.Bxe4#
- 1...Sc6
- 2.Qd6#
- 1...e5
- 2.Qxe5#
- 1...Rg5!
- threat
- 1.Qf5+?
- 1...e5
- 2.Qxe5#
- 1...exf5!
- 1...e5
- 1.Qf6?
- threat
- 2.Qe5#
- 1...Bxf6
- 2.Sxf6#
- 1...Bxc7
- 2.Se7#
- 1...Rf4
- 2.Sxf4#
- 1...Rg5
- 2.Sf4#
- 1...Sc4
- 2.Qd4#
- 1...Sc6
- 2.Qxe6#
- 1...e5
- 2.Qxe5#
- 1...Qd6!
- threat
- 1.Be7?
- Keys
- 1.Qg3!
- threat
- 2.Qe5#
- 1...Rf4+
- 2.Sxf4#
- 1...Rxg3
- 2.Sf4#
- 1...Bxc7
- 2.Se7#
- 1...Qd6
- 2.Qxd6#
- 1...Rg5
- 2.Sf4#
- 1...Bf6
- 2.Sxf6#
- 1...Sc4
- 2.Qxd3#
- 1...Sc6
- 2.Qd6#
- 1...e5
- 2.Qxe5#
- threat
- 1.Qg3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 7
- Sets
- R(b);N_GUARD::QAR1(C)
- R(b);N_GUARD::QAR1(C),XR(b)
- R(d);N_GUARD::S(E)
- R(d);N_GUARD,N_SPINP(c)::S(E)
- R(d);CHECK,N_GUARD::S(E),XR(d)
- B(j);N_GUARD::S(G),XB(j)
- B(j);N_GUARD,XR(F)::S(E)
- B(j);N_GUARD::S(E),XB(j)
- S(e);S_CUTR(b)::QAR1(C)
- Tries
- Try
- B(D);
- Threat
- DUALS(4)
- Vars
- R(d);CHECK,N_GUARD::S(E),XR(d)
- Q(g);::S(G)
- R(b);::S(G)
- S(e);::S(G)
- Refutation
- B(j);XB(D)
- Try
- Q(C);
- Threat
- QAR1(C)
- Vars
- R(d);CHECK,N_GUARD::S(E),XR(d)
- B(j);N_GUARD,XR(F)::S(E)
- Q(g);N_GUARD::QAR1(C),XQ(g)
- R(d);N_GUARD::S(E)
- B(j);N_GUARD::S(G),XB(j)
- S(e);S_CUTQ(g)::QAR1(C)
- P(h);::QAR1(C),XP(h)
- Refutation
- S(e);
- Try
- Q(C);
- Threat
- QAR1(C)
- Vars
- R(d);CHECK,XQ(C)::S(E),XR(d)
- B(j);N_GUARD,XR(F)::S(E)
- Q(g);N_GUARD::QAR1(C),XQ(g)
- B(j);N_GUARD::S(G),XB(j)
- S(e);S_CUTR(b)::B(B),XP(c)
- S(e);S_CUTQ(g)::QAR1(C)
- P(h);::QAR1(C),XP(h)
- Refutation
- R(d);
- Try
- Q(C);CHECK
- Vars
- P(h);::QAR1(C),XP(h)
- Refutation
- P(h);XQ(C)
- Try
- Q(C);
- Threat
- QAR1(C)
- Vars
- B(j);XQ(C)::S(G),XB(j)
- B(j);N_GUARD,XR(F)::S(E)
- R(d);N_GUARD,P_PINQ(C)::S(E),XR(d)
- R(d);N_GUARD::S(E)
- S(e);S_CUTR(b)::QAR1(C)
- S(e);S_CUTQ(g)::QAB1(C),XP(h)
- P(h);::QAR1(C),XP(h)
- Refutation
- Q(g);
- Try
- Actual
- Q(C);
- Threat
- QAR1(C)
- Vars
- R(d);CHECK,N_GUARD::S(E),XR(d)
- R(d);N_GUARD,XQ(C)::S(E)
- B(j);N_GUARD,XR(F)::S(E)
- Q(g);N_GUARD::QAR1(C),XQ(g)
- R(d);N_GUARD::S(E)
- B(j);N_GUARD::S(G),XB(j)
- S(e);S_CUTQ(g),S_CUTR(b)::QAR2(C),XP(a)
- S(e);S_CUTQ(g)::QAR1(C)
- P(h);::QAR1(C),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).