MESON Chess Problem Database
Problem Display
PID: 207970 (7B/3NN3/2r2P1K/1b1B3R/3k1P1R/Q2p4/1n2PP2/2q1r3 w - - 0 1)
Ellerman, Arnoldo
Il Problema, 1932
#2
12 + 7
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qxf4+
- 2.Rxf4#
- 1...Qa1
- 2.f5#
- 1...Qb1
- 2.f5#
- 1...Qd1
- 2.f5#
- 1...Qc2
- 2.f5#
- 1...Qc3
- 2.f5#
- 1...Qc4
- 2.f5#
- 1...Qc5
- 2.f5#
- 1...Rc2
- 2.f7#
- 1...Rc3
- 2.f7#
- 1...Rc4
- 2.f7#
- 1...Rc5
- 2.f7#
- 1...Rxf6+
- 2.Bxf6#
- 1...Rc7
- 2.f7#
- 1...Bc4
- 2.Sxc6#
- 1...Sc4
- 2.Qxd3#
- 1...d2
- 2.Qe3#
- 2.f5#
- 1...Qxf4+
- Tries
- 1.Sb6?
- threat
- 2.Sf5#
- 1...Qxf4+
- 2.Rxf4#
- 1...Rxf6+
- 2.Bxf6#
- 1...Rxb6!
- threat
- 1.Sxc6+?
- 1...Bxc6
- 2.f7#
- 1...Qxc6!
- 1...Bxc6
- 1.Re5?
- threat
- 2.Sf5#
- 2.Re4#
- 1...Qxf4+
- 2.Rxf4#
- 1...Rxe2
- 2.Sf5#
- 1...Qe3
- 2.Sf5#
- 2.fxe3#
- 1...Re6
- 2.Sf5#
- 1...Rxf6+!
- threat
- 1.Qxb2+?
- 1...Qc3
- 2.f5#
- 1...Rc3
- 2.f7#
- 1...Qxb2!
- 1...Qc3
- 1.Qb4+?
- 1...Qc4
- 2.f5#
- 1...Rc4
- 2.f7#
- 1...Bc4
- 2.Sxc6#
- 1...Sc4!
- 1...Qc4
- 1.Qc5+?
- 1...Rxc5
- 2.f7#
- 1...Qxc5!
- 1...Rxc5
- 1.Qc3+?
- 1...Qxc3
- 2.f5#
- 1...Rxc3
- 2.f7#
- 1...Kxc3!
- 1...Qxc3
- 1.Sb6?
- Keys
- 1.Qb3!
- threat
- 2.Sf5#
- 1...Qxf4+
- 2.Rxf4#
- 1...Rxf6+
- 2.Bxf6#
- 1...Qc4
- 2.f5#
- 1...Rc4
- 2.f7#
- 1...Bc4
- 2.Sxc6#
- 1...Sc4
- 2.Qxd3#
- threat
- 1.Qb3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 10
- Sets
- Q(a);CHECK,OGATE,P_PINP(H),P_SPINQ(a),XP(D)::R(E),XQ(a)
- Q(a);N_PINP(D),P_PINP(H)::R(E)+P(D)
- R(g);OGATE::B(L)+P(H)
- R(g);CHECK,OGATE,P_SPINR(g),XP(H)::B(L),XR(g)
- B(f);N_GUARD,S_CUTQ(a)::S(K),XR(g)
- S(c);N_GUARD,S_CUTB(f)::QAR1(C),XP(d)
- Tries
- Try
- S(J);
- Threat
- S(K)
- Vars
- Q(a);CHECK,OGATE,P_PINP(H),P_SPINQ(a),XP(D)::R(E),XQ(a)
- R(g);CHECK,OGATE,P_SPINR(g),XP(H)::B(L),XR(g)
- Refutation
- R(g);XS(J)
- Try
- S(K);CHECK,XR(g)
- Vars
- B(f);XS(K)::B(L)+P(H)
- Refutation
- Q(a);N_PINP(D),P_PINP(H),XS(K)
- Try
- R(G);
- Threat
- DUALS(2)
- Vars
- Q(a);CHECK,OGATE,P_PINP(H),P_SPINQ(a),XP(D)::R(E),XQ(a)
- R(b);XP(A)::S(K)
- R(g);::S(K)
- Refutation
- R(g);CHECK,XP(H)
- Try
- Q(C);CHECK,XS(c)
- Vars
- Q(a);N_PINP(D),P_PINP(H),P_SPINQ(a)::R(E)+P(D)
- R(g);OGATE,P_SPINR(g)::B(L)+P(H)
- Refutation
- Q(a);N_PINP(D),P_PINP(H),XQ(C)
- Try
- Q(C);CHECK
- Vars
- Q(a);N_PINP(D),P_PINP(H),P_SPINQ(a)::R(E)+P(D)
- R(g);OGATE,P_SPINR(g)::B(L)+P(H)
- B(f);P_SPINB(f)::S(K),XR(g)
- Refutation
- S(c);P_SPINS(c)
- Try
- Q(C);CHECK
- Vars
- R(g);OGATE,XQ(C)::B(L)+P(H)
- Refutation
- Q(a);N_PINP(D),P_PINP(H),XQ(C)
- Try
- Q(C);CHECK
- Vars
- Q(a);N_PINP(D),P_PINP(H),SBLOCK,XQ(C)::R(E)+P(D)
- R(g);OGATE,SBLOCK,XQ(C)::B(L)+P(H)
- Refutation
- K(e);S_FLIGHT,XQ(C)
- Try
- Actual
- Q(C);
- Threat
- S(K)
- Vars
- Q(a);CHECK,OGATE,P_PINP(H),P_SPINQ(a),XP(D)::R(E),XQ(a)
- R(g);CHECK,OGATE,P_SPINR(g),XP(H)::B(L),XR(g)
- Q(a);N_PINP(D),P_PINP(H)::R(E)+P(D)
- R(g);OGATE::B(L)+P(H)
- B(f);N_GUARD,S_CUTQ(a)::S(K),XR(g)
- S(c);N_GUARD,S_CUTB(f)::QAR1(C),XP(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).