MESON Chess Problem Database
Problem Display
PID: 239820 (6B1/3p4/3K4/pN2B3/Pk1pQ3/3q3R/R7/8 w - - 0 1)
Ellerman, Arnoldo
Themes-64, 1962
#2
8 + 5
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Qxb1#
- 2.Qxd4#
- 1...Qf1
- 2.Rb3#
- 1...Qe2
- 2.Rb3#
- 1...Qxe4
- 2.Rb3#
- 1...Qxb5
- 2.Rb3#
- 2.Qb1#
- 2.Qe1#
- 1...Qd2
- 2.Rb3#
- 1...Qa3
- 2.Qxd4#
- 1...Qb3
- 2.Rxb3#
- 1...Qf3
- 2.Qxd4#
- 1...Qg3
- 2.Qxd4#
- 1...Qxh3
- 2.Qxd4#
- 1...Qb1
- Tries
- 1.Bxd4?
- 1...Qg3+
- 2.Be5#
- 1...Qxd4+
- 2.Qxd4#
- 1...Qxe4
- 2.Bc3#
- 2.Bc5#
- 2.Rb3#
- 1...Qxb5
- 2.Bc3#
- 2.Bc5#
- 2.Rb3#
- 2.Qb1#
- 2.Qe1#
- 1...Qxh3
- 2.Ba1#
- 2.Bg1#
- 2.Bb2#
- 2.Bf2#
- 2.Bc3#
- 2.Be3#
- 2.Bc5#
- 2.Be5#
- 2.Bb6#
- 2.Bf6#
- 2.Ba7#
- 2.Bg7#
- 2.Bh8#
- 1...Qa3
- 2.Ba1#
- 2.Bg1#
- 2.Bb2#
- 2.Bf2#
- 2.Bc3#
- 2.Be3#
- 2.Bc5#
- 2.Be5#
- 2.Bb6#
- 2.Bf6#
- 2.Ba7#
- 2.Bg7#
- 2.Bh8#
- 1...Qc4
- 2.Bc5#
- 1...Qb1
- 2.Bc3#
- 2.Bc5#
- 2.Qxb1#
- 1...Qf1
- 2.Bc3#
- 2.Bc5#
- 2.Rb3#
- 1...Qc2
- 2.Bc3#
- 2.Bc5#
- 1...Qe2
- 2.Bc3#
- 2.Bc5#
- 2.Rb3#
- 1...Qd2
- 2.Rb3#
- 1...Qb3
- 2.Bc3#
- 2.Bc5#
- 2.Rxb3#
- 1...Qc3
- 2.Bxc3#
- 2.Bc5#
- 1...Qe3
- 2.Bc3#
- 2.Bxe3#
- 2.Bc5#
- 1...Qf3
- 2.Bc3#
- 2.Bc5#
- 1...Qd1!
- 1...Qg3+
- 1.Rb2+?
- 1...Qb3
- 2.Qxd4#
- 1...Kxa4!
- 1...Qb3
- 1.Qe1+?
- 1...Qd2
- 2.Rb3#
- 2.Qxd2#
- 1...Qc3!
- 1...Qd2
- 1.Qxd4+?
- 1...Qc4
- 2.Qxc4#
- 1...Qxd4+!
- 1...Qc4
- 1.Bxd4?
- Keys
- 1.Sxd4!
- 1...Qa6+
- 2.Sc6#
- 1...Qxd4+
- 2.Qxd4#
- 1...Kc3
- 2.Qe1#
- 1...Qxe4
- 2.Rb3#
- 1...Qxh3
- 2.Sc2#
- 2.Se2#
- 2.Sb3#
- 2.Sf3#
- 2.Sb5#
- 2.Sf5#
- 2.Sc6#
- 1...Qb1
- 2.Sc2#
- 2.Sc6#
- 2.Qxb1#
- 2.Qb7#
- 1...Qf1
- 2.Sc2#
- 2.Se2#
- 2.Sc6#
- 2.Rb3#
- 1...Qc2
- 2.Sxc2#
- 2.Sc6#
- 2.Qb7#
- 1...Qe2
- 2.Sc2#
- 2.Sxe2#
- 2.Sc6#
- 2.Rb3#
- 1...Qc4
- 2.Sc2#
- 1...Qb5
- 2.Sc2#
- 2.Sxb5#
- 2.Sc6#
- 2.Rb3#
- 2.Qb1#
- 2.Qe1#
- 1...Qd1
- 2.Qb7#
- 1...Qd2
- 2.Rb3#
- 2.Qb7#
- 1...Qa3
- 2.Sc2#
- 2.Se2#
- 2.Sb3#
- 2.Sf3#
- 2.Sb5#
- 2.Sf5#
- 2.Sc6#
- 2.Se6#
- 1...Qb3
- 2.Sc2#
- 2.Sxb3#
- 2.Sc6#
- 2.Rxb3#
- 2.Qb7#
- 1...Qc3
- 2.Sc2#
- 2.Sc6#
- 2.Qb7#
- 1...Qe3
- 2.Sc2#
- 2.Sc6#
- 1...Qf3
- 2.Sc2#
- 2.Sxf3#
- 2.Sc6#
- 1...Qg3
- 2.Sc2#
- 2.Se2#
- 2.Sb3#
- 2.Sf3#
- 2.Sb5#
- 2.Sf5#
- 2.Sc6#
- 1...Qa6+
- 1.Sxd4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 8
- Sets
- Q(a);OGATE::R1(B)
- Q(a);N_SPINP(c),OGATE,XQ(D)::R1(B)
- Q(a);N_GUARD::QAR2(D),XP(c)
- Q(a);OGATE::R1(B),XQ(a)
- Q(a);N_GUARD,P_PINB(F)::QAR2(D),XP(c)
- Q(a);N_GUARD,XR(B)::QAR2(D),XP(c)
- Tries
- Try
- B(F);P_SPINB(F),XP(c)
- Vars
- Q(a);CHECK,N_PINB(F)::QAR(D)+B(F)
- Q(a);CHECK,OGATE,P_SPINQ(a),XB(F)::QAR2(D),XQ(a)
- Q(a);N_PINB(F)::B(F)
- Q(a);::R1(B)
- Refutation
- Q(a);
- Try
- R(A);CHECK
- Vars
- Q(a);P_SPINQ(a)::QAR2(D),XP(c)
- Refutation
- K(b);P-FLIGHT,XP(C)
- Try
- Q(D);CHECK,N_PINP(c)
- Refutation
- Q(a);P_SPINQ(a)
- Try
- Q(D);CHECK,P_SPINQ(D),XP(c)
- Vars
- Q(a);N_PINQ(D),P_SPINQ(a)::QAR1(D),XQ(a)
- Refutation
- Q(a);CHECK,XQ(D)
- Try
- Actual
- S(E);P_SPINS(E),XP(c)
- Vars
- Q(a);CHECK,N_PINS(E)::QAR(D)+S(E),DCHECK
- Q(a);CHECK,OGATE,P_SPINQ(a),XS(E)::QAR2(D),XQ(a)
- K(b);P_SPINQ(a),S_FLIGHT::QAB(D)
- Q(a);N_PINS(E),OGATE,XQ(D)::R1(B)
- Q(a);N_PINS(E)::S(E)
- Q(a);N_GUARD::QAR(D)
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).