MESON Chess Problem Database
Problem Display
PID: 231343 (1R1R4/p7/N1k5/n7/r5p1/1NrB2Kb/2Q3p1/b2n2B1 w - - 0 1)
Ellerman, Arnoldo
Shakhmaty, 1927
#2
8 + 10
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rxc2
- 2.Bb5#
- 1...Rcc4
- 2.Be4#
- 1...Rc5
- 2.Bb5#
- 2.Qxc5#
- 1...Ra2
- 2.Sd4#
- 1...Ra3
- 2.Sd4#
- 1...Rb4
- 2.Sxa5#
- 1...Rac4
- 2.Sxa5#
- 1...Rd4
- 2.Sxd4#
- 2.Sxa5#
- 1...Re4
- 2.Sxa5#
- 1...Rf4
- 2.Sxa5#
- 1...Se3
- 2.Bb5#
- 1...Sc4
- 2.Sd4#
- 1...Sb7
- 2.Rbc8#
- 1...Rxc2
- Tries
- 1.Kh2?
- threat
- 2.Bb5#
- 1...Rcc4
- 2.Be4#
- 1...Rb4
- 2.Sxa5#
- 1...Rac4
- 2.Sxa5#
- 1...Sc4
- 2.Sd4#
- 2.Be4#
- 1...Sb7
- 2.Rbc8#
- 1...g3+!
- threat
- 1.Kh4?
- threat
- 2.Bb5#
- 1...Rcc4
- 2.Be4#
- 1...Rb4
- 2.Sxa5#
- 1...Rac4
- 2.Sxa5#
- 1...Sc4
- 2.Sd4#
- 2.Be4#
- 1...Sb7
- 2.Rbc8#
- 1...g3+!
- threat
- 1.Rb4?
- threat
- 2.Sd4#
- 1...Rxc2
- 2.Be4#
- 1...Rxb4
- 2.Sxa5#
- 1...Rc4
- 2.Be4#
- 1...Rc5
- 2.Be4#
- 2.Qxc5#
- 1...Sxb3!
- threat
- 1.Qe2?
- threat
- 2.Qe6#
- 2.Qe8#
- 1...Rd4
- 2.Sxd4#
- 2.Sxa5#
- 1...Re4
- 2.Sxa5#
- 2.Qxe4#
- 1...Se3
- 2.Bb5#
- 1...Sc4
- 2.Sd4#
- 2.Qe4#
- 2.Qe8#
- 1...Sb7
- 2.Rbc8#
- 2.Qe8#
- 1...Rxd3+!
- threat
- 1.Qxg2+?
- 1...Re4
- 2.Sd4#
- 2.Sxa5#
- 2.Qxe4#
- 1...Bxg2!
- 1...Re4
- 1.Qxc3+?
- 1...Rc4
- 2.Sd4#
- 2.Sxa5#
- 2.Be4#
- 1...Bxc3
- 2.Bb5#
- 1...Sc4
- 2.Sd4#
- 2.Be4#
- 1...Sxc3!
- 1...Rc4
- 1.Kh2?
- Keys
- 1.Qc1!
- threat
- 2.Qh6#
- 1...Rxc1
- 2.Bb5#
- 1...Rc2
- 2.Bb5#
- 1...Rcc4
- 2.Be4#
- 1...Rc5
- 2.Bb5#
- 2.Qxc5#
- 1...Rd4
- 2.Sxd4#
- 2.Sxa5#
- 1...Re4
- 2.Sxa5#
- 1...Rf4
- 2.Sxa5#
- 1...Se3
- 2.Bb5#
- 1...Sc4
- 2.Sd4#
- 1...Sb7
- 2.Rbc8#
- threat
- 1.Qc1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- R(d);N_PINB(D),N_SPINR(d),XQ(B)::B(D)
- R(d);N_PINB(D)::B(D)
- R(f);N_GUARD::S(C)
- R(f);N_GUARD::S(C),XS(h)
- R(f);N_GUARD,N_SPINR(d)::S(C),XS(h)
- S(b);N_PINB(D)::B(D)
- S(h);N_SPINR(d),S_CUTR(f)::S(C)
- S(h);SBLOCK::R(G)
- Tries
- Try
- K(E);N_SPINB(D),S_FLIGHT
- Threat
- B(D)
- Vars
- R(d);S_CUTR(f)::B(D)
- R(f);N_GUARD::S(C),XS(h)
- R(f);N_GUARD,N_SPINR(d)::S(C),XS(h)
- S(h);SBLOCK::R(G)
- Refutation
- P(g);CHECK
- Try
- K(E);N_SPINB(D),S_FLIGHT
- Threat
- B(D)
- Vars
- R(d);S_CUTR(f)::B(D)
- R(f);N_GUARD::S(C),XS(h)
- R(f);N_GUARD,N_SPINR(d)::S(C),XS(h)
- S(h);SBLOCK::R(G)
- Refutation
- P(g);CHECK
- Try
- R(G);
- Threat
- S(C)
- Vars
- R(d);N_PINB(D),N_SPINR(d),XQ(B)::B(D)
- R(f);N_GUARD,XR(G)::S(C),XS(h)
- R(d);N_PINB(D)::B(D)
- Refutation
- S(h);XS(C)
- Try
- Q(B);N_PINR(d)
- Threat
- DUALS(2)
- Vars
- S(b);N_PINB(D)::B(D)
- Refutation
- R(d);CHECK,XB(D)
- Try
- Q(B);CHECK,N_PINR(d),XP(c)
- Refutation
- B(e);XQ(B)
- Try
- Q(B);CHECK,N_SPINB(D),XR(d)
- Vars
- B(a);XQ(B)::B(D)
- Refutation
- S(b);XQ(B)
- Try
- Actual
- Q(B);
- Threat
- QAR(B)
- Vars
- R(d);N_PINB(D),N_SPINR(d),XQ(B)::B(D)
- R(d);N_PINB(D)::B(D)
- R(f);N_GUARD::S(C),XS(h)
- S(b);N_PINB(D)::B(D)
- S(h);N_SPINR(d),S_CUTR(f)::S(C)
- S(h);SBLOCK::R(G)
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).