MESON Chess Problem Database
Problem Display
PID: 9646 (2R5/8/8/pN3K2/p6Q/p2B2N1/Rp2p2P/2Bk4 w - - 0 1)
Palkoska, Emil
2nd Prize, Norwich Mercury, 1907
#2
9 + 6
| 1829 | The Theory of Pawn Promotion | 1912 |
| 5424 | Versunkene Schatze | 1998 |
| 56 | The Problemist | 2007 |
SOLUTION
- SOUND
- Sets
- 1...e1Q
- 2.Qxa4#
- 1...e1S
- 2.Be2#
- 1...e1B
- 2.Be2#
- 2.Qxa4#
- 2.Qg4#
- 2.Qh5#
- 1...e1R
- 2.Qxa4#
- 1...e1Q
- Tries
- 1.Sxe2?
- threat
- 2.Sbc3#
- 1...bxc1Q
- 2.Rxc1#
- 1...bxc1R
- 2.Rxc1#
- 1...b1S!
- threat
- 1.Se4?
- 1...bxc1Q
- 2.Bxe2#
- 1...bxc1S
- 2.Sec3#
- 2.Sbc3#
- 2.Bc2#
- 2.Rd2#
- 1...bxc1B
- 2.Sec3#
- 2.Sbc3#
- 2.Bc2#
- 2.Bxe2#
- 1...bxc1R
- 2.Bxe2#
- 2.Rd2#
- 1...b1Q
- 2.Bxe2#
- 2.Rd2#
- 1...b1S
- 2.Bxe2#
- 1...b1B
- 2.Bxe2#
- 2.Rd2#
- 1...b1R
- 2.Bxe2#
- 2.Rd2#
- 1...e1S
- 2.Sf2#
- 1...e1B
- 2.Qg4#
- 2.Qh5#
- 1...e1R
- 2.Sf2#
- 1...e1Q!
- 1...bxc1Q
- 1.Sh5?
- 1...bxc1Q
- 2.Bxe2#
- 1...bxc1S
- 2.Sc3#
- 1...bxc1B
- 2.Sc3#
- 2.Bxe2#
- 1...bxc1R
- 2.Bxe2#
- 1...b1Q
- 2.Rd2#
- 1...b1S
- 2.Bxe2#
- 1...b1B
- 2.Rd2#
- 1...b1R
- 2.Bxe2#
- 2.Rd2#
- 1...e1Q
- 2.Qxa4#
- 1...e1B
- 2.Qxa4#
- 2.Qg4#
- 1...e1R
- 2.Qxa4#
- 1...e1S!
- 1...bxc1Q
- 1.Sc3+?
- 1...Kxc1
- 2.Qg5#
- 2.Qf4#
- 2.Qh6#
- 1...Ke1!
- 1...Kxc1
- 1.Bc2+?
- 1...Kxc1
- 2.Qg5#
- 2.Qf4#
- 2.Qh6#
- 1...Ke1!
- 1...Kxc1
- 1.Qb4?
- threat
- 2.Bxe2#
- 2.Qd2#
- 1...bxc1Q
- 2.Bxe2#
- 1...bxc1S
- 2.Bc2#
- 2.Qd2#
- 1...bxc1B
- 2.Bc2#
- 2.Bxe2#
- 1...b1Q
- 2.Qd2#
- 1...b1S
- 2.Bxe2#
- 1...b1B
- 2.Qd2#
- 1...e1Q
- 2.Qxa4#
- 1...e1S
- 2.Be2#
- 2.Qd2#
- 1...e1B
- 2.Be2#
- 2.Qxa4#
- 2.Qg4#
- 1...e1R
- 2.Qd2#
- 2.Qxa4#
- 1...axb4!
- threat
- 1.Qe4?
- threat
- 2.Qxe2#
- 1...Ke1
- 2.Qxe2#
- 1...e1Q
- 2.Qxa4#
- 1...e1S
- 2.Be2#
- 2.Qe2#
- 1...e1B
- 2.Be2#
- 2.Qf3#
- 2.Qe2#
- 2.Qxa4#
- 2.Qg4#
- 1...e1R
- 2.Qxa4#
- 1...bxc1S!
- threat
- 1.Qg4?
- threat
- 2.Qxe2#
- 1...Ke1
- 2.Qxe2#
- 1...bxc1S!
- threat
- 1.Qh5?
- threat
- 2.Qxe2#
- 1...Ke1
- 2.Qxe2#
- 1...bxc1S!
- threat
- 1.Sxe2?
- Keys
- 1.Sh1!
- 1...bxc1Q
- 2.Bxe2#
- 1...bxc1S
- 2.Sc3#
- 1...bxc1B
- 2.Sc3#
- 2.Bxe2#
- 1...bxc1R
- 2.Bxe2#
- 1...b1Q
- 2.Rd2#
- 1...b1S
- 2.Bxe2#
- 1...b1B
- 2.Rd2#
- 1...b1R
- 2.Bxe2#
- 2.Rd2#
- 1...e1Q
- 2.Qxa4#
- 1...e1S
- 2.Sf2#
- 1...e1B
- 2.Qxa4#
- 2.Qg4#
- 2.Qh5#
- 1...e1R
- 2.Sf2#
- 2.Qxa4#
- 1...bxc1Q
- 1.Sh1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 6
- REMOVED MATES = 1
- Sets
- P(c);SBLOCK::QAB(F),XP(e)
- P(c);SBLOCK::B(D)
- Tries
- Try
- S(E);XP(c)
- Threat
- S(G)
- Vars
- P(b);OGATE,XB(A)::R1(I),XQ(b)
- P(b);OGATE,XB(A)::R1(I),XR(b)
- Refutation
- P(b);
- Try
- S(E);
- Vars
- P(b);XB(A)::B(D),XP(c)
- P(b);::B(D),XP(c)
- P(c);SBLOCK::S(E)
- Refutation
- P(c);
- Try
- S(E);
- Vars
- P(b);XB(A)::B(D),XP(c)
- P(b);SBLOCK,XB(A)::S(G)
- P(b);OGATE,P_PINB(D)::R1(B)
- P(b);::B(D),XP(c)
- P(c);SBLOCK::QAB(F),XP(e)
- Refutation
- P(c);
- Try
- S(G);CHECK
- Refutation
- K(a);P-FLIGHT
- Try
- B(D);CHECK
- Refutation
- K(a);P-FLIGHT
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- P(b);XB(A)::B(D),XP(c)
- P(b);P_PINB(D)::QAR1(F)
- P(b);::B(D),XP(c)
- P(c);SBLOCK::QAB(F),XP(e)
- Refutation
- P(f);XQ(F)
- Try
- Q(F);
- Threat
- QAB1(F),XP(c)
- Vars
- K(a);P-FLIGHT,P_SPINP(c)::QAR1(F),XP(c)
- P(c);SBLOCK::QAB(F),XP(e)
- Refutation
- P(b);XB(A)
- Try
- Q(F);P_PINP(c)
- Threat
- QAB1(F),XP(c)
- Vars
- K(a);N_SPINP(c),P-FLIGHT::QAR1(F),XP(c)
- Refutation
- P(b);XB(A)
- Try
- Q(F);P_PINP(c)
- Threat
- QAB1(F),XP(c)
- Vars
- K(a);N_SPINP(c),P-FLIGHT::QAR1(F),XP(c)
- Refutation
- P(b);XB(A)
- Try
- Actual
- S(E);
- Vars
- P(b);XB(A)::B(D),XP(c)
- P(b);SBLOCK,XB(A)::S(G)
- P(b);OGATE,P_PINB(D)::R1(B)
- P(b);::B(D),XP(c)
- P(c);SBLOCK::QAB(F),XP(e)
- P(c);SBLOCK::S(E)
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).