MESON Chess Problem Database
Problem Display
PID: 237719 (nQ6/3p1Kp1/p2R2p1/1b4B1/R3pN2/1Bk1r1P1/1pPN1b2/7q w - - 0 1)
Ellerman, Arnoldo
Arbejder-Skak, 1947
#2
10 + 12
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qg2
- 2.Sb1#
- 1...Qf3
- 2.Sb1#
- 1...Qb1
- 2.Sxb1#
- 1...Qh2
- 2.Sb1#
- 1...Qh3
- 2.Sb1#
- 1...Qh4
- 2.Sb1#
- 1...Qh5
- 2.Sb1#
- 1...Qh6
- 2.Sb1#
- 1...Qh7
- 2.Sb1#
- 1...Qh8
- 2.Sb1#
- 1...Re1
- 2.Sd5#
- 1...Re2
- 2.Sd5#
- 1...Rd3
- 2.Se2#
- 1...Rf3
- 2.Sxe4#
- 1...Rxg3
- 2.Sd5#
- 1...Be1
- 2.Sb1#
- 1...Bg1
- 2.Sb1#
- 1...Bf1
- 2.Sb1#
- 2.Qb4#
- 1...Be2
- 2.Qb4#
- 1...Bd3
- 2.Qb4#
- 1...Bc4+
- 2.Rxc4#
- 1...Bc6
- 2.Rc4#
- 2.Qb4#
- 1...Qg2
- Tries
- 1.Sxe4+?
- 1...Rxe4
- 2.Sd5#
- 1...Qxe4!
- 1...Rxe4
- 1.Se2+?
- 1...Bxe2
- 2.Qb4#
- 1...Rxe2!
- 1...Bxe2
- 1.Rd3+?
- 1...Rxd3
- 2.Se2#
- 1...Bxd3
- 2.Qb4#
- 1...exd3!
- 1...Rxd3
- 1.Qc7+?
- 1...Bc4+
- 2.Rxc4#
- 2.Qxc4#
- 1...Bc6
- 2.Rc4#
- 2.Qa5#
- 1...Sxc7!
- 1...Bc4+
- 1.Qxb5?
- threat
- 2.Rc4#
- 2.Qc4#
- 2.Qb4#
- 2.Qa5#
- 2.Qc5#
- 2.Qe5#
- 1...Rxg3
- 2.Se2#
- 2.Sd5#
- 2.Rc4#
- 2.Qc4#
- 2.Qb4#
- 2.Qa5#
- 1...Rd3
- 2.Se2#
- 2.Qb4#
- 2.Qa5#
- 1...b1Q
- 2.Qe5#
- 1...b1S
- 2.Qe5#
- 1...b1B
- 2.Qe5#
- 1...b1R
- 2.Qe5#
- 1...Qf1
- 2.Qb4#
- 2.Qa5#
- 2.Qe5#
- 1...Re1
- 2.Sd5#
- 2.Rc4#
- 2.Qc4#
- 2.Qb4#
- 2.Qa5#
- 1...Re2
- 2.Sxe2#
- 2.Sd5#
- 2.Rc4#
- 2.Qc4#
- 2.Qb4#
- 2.Qa5#
- 1...Rf3
- 2.Sxe4#
- 2.Rc4#
- 2.Qc4#
- 2.Qb4#
- 2.Qa5#
- 1...Sb6
- 2.Qb4#
- 2.Qa5#
- 2.Qe5#
- 1...a5
- 2.Rc4#
- 2.Qc4#
- 2.Qxa5#
- 2.Qc5#
- 2.Qe5#
- 1...axb5!
- threat
- 1.Qb6?
- threat
- 2.Qd4#
- 2.Qa5#
- 1...Bc4+
- 2.Rxc4#
- 1...Rxg3
- 2.Sd5#
- 2.Qa5#
- 1...Rd3
- 2.Se2#
- 2.Qa5#
- 1...Bd3
- 2.Qa5#
- 2.Qb4#
- 1...b1Q
- 2.Qd4#
- 1...b1S
- 2.Qd4#
- 1...b1B
- 2.Qd4#
- 1...b1R
- 2.Qd4#
- 1...Re1
- 2.Sd5#
- 2.Qa5#
- 1...Re2
- 2.Sd5#
- 2.Qa5#
- 1...Rf3
- 2.Sxe4#
- 2.Qa5#
- 1...a5
- 2.Qd4#
- 2.Qxa5#
- 1...Sxb6!
- threat
- 1.Qc8+?
- 1...Bc4+
- 2.Rxc4#
- 2.Qxc4#
- 1...Bc6
- 2.Rc4#
- 1...Sc7!
- 1...Bc4+
- 1.Sxe4+?
- Keys
- 1.Bh6!
- threat
- 2.Bxg7#
- 1...Bc4+
- 2.Rxc4#
- 1...Qxh6
- 2.Sb1#
- 1...Rxg3
- 2.Sd5#
- 1...gxh6
- 2.Qh8#
- 1...Rd3
- 2.Se2#
- 1...Bd3
- 2.Qb4#
- 1...Qh4
- 2.Sb1#
- 1...Qh5
- 2.Sb1#
- 1...Re1
- 2.Sd5#
- 1...Re2
- 2.Sd5#
- 1...Rf3
- 2.Sxe4#
- threat
- 1.Bh6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 10
- Sets
- Q(a);N_GUARD::S(B)
- Q(a);N_GUARD,P_PINS(F)::S(B)
- Q(a);N_GUARD::S(B),XQ(a)
- R(e);::S(F)
- R(e);N_GUARD,S_CUTB(g)::S(F)
- R(e);N_GUARD,P_PINS(F),S_CUTQ(a)::S(B),XP(f)
- R(e);XP(D)::S(F)
- B(c);S_CUTQ(a)::S(B)
- B(g);OGATE::QAB1(J)
- B(g);CHECK,N_GUARD::R1(E),XB(g)
- Tries
- Try
- S(B);CHECK,XP(f)
- Vars
- R(e);XS(B)::S(F)
- Refutation
- Q(a);XS(B)
- Try
- S(F);CHECK
- Vars
- B(g);OGATE,XS(F)::QAB1(J)
- Refutation
- R(e);XS(F)
- Try
- R(H);CHECK
- Vars
- R(e);XR(H)::S(F)
- B(g);OGATE,XR(H)::QAB1(J)
- Refutation
- P(f);XR(H)
- Try
- Q(J);CHECK
- Refutation
- S(l);XQ(J)
- Try
- Q(J);XB(g)
- Threat
- DUALS(6)
- Vars
- P(b);::QAB(J)
- Refutation
- P(h);XQ(J)
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- B(g);CHECK,N_GUARD::R1(E),XB(g)
- P(b);::QAB1(J)
- Refutation
- S(l);XQ(J)
- Try
- Q(J);CHECK
- Vars
- B(g);N_GUARD,P_SPINB(g)::R1(E)
- Refutation
- S(l);P_SPINS(l)
- Try
- Actual
- B(G);
- Threat
- B(G),XP(k)
- Vars
- B(g);CHECK,N_GUARD::R1(E),XB(g)
- Q(a);N_GUARD,XB(G)::S(B)
- R(e);XP(D)::S(F)
- P(k);OGATEB,XB(G)::QAB(J)
- R(e);N_GUARD,S_CUTB(g)::S(F)
- B(g);OGATE::QAB1(J)
- Q(a);N_GUARD::S(B)
- R(e);::S(F)
- R(e);N_GUARD,P_PINS(F),S_CUTQ(a)::S(B),XP(f)
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).