MESON Chess Problem Database
Problem Display
PID: 83610 (2K2B2/1pQ5/1P1pkPP1/RNq4N/3p2P1/3P2R1/8/7B w - - 0 1)
Ellerman, Arnoldo
Shakhmaty, 1931
#2
13 + 5
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qa3
- 2.Sxd4#
- 2.Qe7#
- 1...Qb4
- 2.Qe7#
- 1...Qxb6
- 2.Qe7#
- 1...Qc1
- 2.Sxd4#
- 1...Qc2
- 2.Sxd4#
- 1...Qxb5
- 2.Qxd6#
- 2.Qe7#
- 1...Qd5
- 2.Qe7#
- 1...Qe5
- 2.Qd7#
- 2.Qe7#
- 2.Qf7#
- 1...Qf5
- 2.Sxd4#
- 2.Qxd6#
- 2.Qe7#
- 1...Qg5
- 2.Sxd4#
- 2.Qxd6#
- 2.Qe7#
- 1...Qxh5
- 2.Qxd6#
- 2.Qe7#
- 1...Qc6
- 2.Sxd4#
- 1...Qxc7+
- 2.Sxc7#
- 1...Qa3
- Tries
- 1.Sxd4+?
- 1...Qxd4
- 2.Qd7#
- 2.Qe7#
- 2.Qf7#
- 1...Ke5!
- 1...Qxd4
- 1.Bc6?
- threat
- 2.Qe7#
- 1...Ke5
- 2.Qe7#
- 1...Qxc6
- 2.Sxd4#
- 1...d5
- 2.Bd7#
- 1...bxc6!
- threat
- 1.Rg1?
- 1...Qxc7+
- 2.Sxc7#
- 1...Ke5
- 2.Re1#
- 1...Qxb6
- 2.Re1#
- 2.Qe7#
- 1...Qxb5
- 2.Qxd6#
- 2.Qe7#
- 1...Qxh5
- 2.Qxd6#
- 2.Qe7#
- 1...d5
- 2.Re1#
- 1...Qa3
- 2.Sxd4#
- 2.Re1#
- 2.Qe7#
- 1...Qb4
- 2.Qe7#
- 1...Qc1
- 2.Sxd4#
- 1...Qc2
- 2.Sxd4#
- 1...Qc4
- 2.Re1#
- 1...Qd5
- 2.Qe7#
- 1...Qe5
- 2.Qd7#
- 2.Qe7#
- 2.Qf7#
- 1...Qf5
- 2.Sxd4#
- 2.Qxd6#
- 2.Qe7#
- 1...Qg5
- 2.Sxd4#
- 2.Qxd6#
- 2.Qe7#
- 1...Qc6
- 2.Sxd4#
- 1...Qc3!
- 1...Qxc7+
- 1.Re3+?
- 1...Qe5
- 2.Sxd4#
- 2.Qxd6#
- 2.Qd7#
- 2.Qe7#
- 2.Qf7#
- 1...dxe3!
- 1...Qe5
- 1.Qxc5?
- threat
- 2.Sxd4#
- 2.Sc7#
- 2.Qxd6#
- 2.Qd5#
- 2.Qf5#
- 1...d5
- 2.Qd6#
- 2.Qe7#
- 2.Qxd5#
- 1...dxc5!
- threat
- 1.Sxd4+?
- Keys
- 1.Rg2!
- 1...Qxc7+
- 2.Sxc7#
- 1...Kd5
- 2.Re2#
- 1...Ke5
- 2.Re2#
- 1...Qxb6
- 2.Re2#
- 1...Qxb5
- 2.Qxd6#
- 1...Qxh5
- 2.Qxd6#
- 1...d5
- 2.Re2#
- 1...Qa3
- 2.Sxd4#
- 2.Re2#
- 1...Qb4
- 2.Re2#
- 1...Qc1
- 2.Sxd4#
- 1...Qc2
- 2.Sxd4#
- 1...Qc3
- 2.Re2#
- 1...Qc4
- 2.Re2#
- 1...Qd5
- 2.Qe7#
- 1...Qe5
- 2.Qf7#
- 1...Qf5
- 2.Sxd4#
- 2.Qxd6#
- 1...Qg5
- 2.Sxd4#
- 2.Qxd6#
- 1...Qc6
- 2.Sxd4#
- 1...Qxc7+
- 1.Rg2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 8
- REMOVED MATES = 0
- Sets
- Q(b);N_PINQ(K)::QAR1(K)
- Q(b);N_PINQ(K),XP(H)::QAR1(K)
- Q(b);N_GUARD::S(F),XP(a)
- Q(b);CHECK,XQ(K)::S(F),XQ(b)
- Tries
- Try
- S(F);CHECK,XP(a)
- Refutation
- K(d);P-FLIGHT,P_SPINP(c),P_SPINQ(b)
- Try
- B(A);N_SPINQ(K)
- Threat
- QAR1(K)
- Vars
- K(d);P-FLIGHT,P_SPINP(c)::QAR2(K)
- Q(b);N_GUARD,P_PINQ(K),XB(A)::S(F),XP(a)
- P(c);SBLOCK::B(A)
- Refutation
- P(e);XB(A)
- Try
- R(C);
- Vars
- Q(b);CHECK,XQ(K)::S(F),XQ(b)
- K(d);P-FLIGHT,P_SPINP(c)::R(C)
- P(c);S_CUTQ(b)::R(C)
- Q(b);N_PINQ(K)::QAR1(K)
- Q(b);N_GUARD::S(F),XP(a)
- Q(b);N_GUARD::R(C)
- Refutation
- Q(b);
- Try
- R(C);CHECK
- Refutation
- P(a);XR(C)
- Try
- Q(K);N_SPINQ(K),XQ(b)
- Threat
- DUALS(5)
- Refutation
- P(c);XQ(K)
- Try
- Actual
- R(C);
- Vars
- Q(b);CHECK,XQ(K)::S(F),XQ(b)
- K(d);S_FLIGHT::B(A)+R(C)
- K(d);P-FLIGHT,P_SPINP(c)::R(C)
- Q(b);N_GUARD,N_PINQ(K),XP(H)::R(C)
- Q(b);N_PINQ(K),XS(F)::QAR1(K),XP(c)
- Q(b);N_PINQ(K),XS(G)::QAR1(K),XP(c)
- P(c);S_CUTQ(b)::R(C)
- Q(b);N_GUARD,N_PINQ(K)::R(C)
- Q(b);N_GUARD::S(F),XP(a)
- Q(b);N_GUARD::R(C)
- Q(b);N_PINQ(K),SBLOCK::QAR1(K)
- Q(b);N_PINQ(K),SBLOCK::QAB1(K)
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).