MESON Chess Problem Database
Problem Display
PID: 268022 (1Q6/3PK3/3R2p1/3R1NN1/5kpP/q3pP2/2P1rn1P/2BB4 w - - 0 1)
Willems, PJH
El Diluvio, 1933
#2
13 + 7
SOLUTION
- SOUND
- Sets
- 1...Qxc1
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rxg6#
- 1...Qxd6+
- 2.Qxd6#
- 1...Qa2
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rxg6#
- 1...Qb3
- 2.Rb6#
- 1...Qd3
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rxg6#
- 1...Qa4
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rxg6#
- 1...Qa5
- 2.Rb6#
- 1...Qa6
- 2.Rxa6#
- 2.Rb6#
- 2.Rc6#
- 1...Re1
- 2.Se6#
- 1...Rxc2
- 2.Se6#
- 1...Rd2
- 2.Se6#
- 1...g3
- 2.hxg3#
- 1...Qxc1
- Tries
- 1.Sg3?
- threat
- 2.Sxe2#
- 2.Qf8#
- 1...Qxd6+
- 2.Qxd6#
- 1...Rxc2
- 2.Se6#
- 2.Qf8#
- 1...Qb2
- 2.Sxe2#
- 2.Rf6#
- 1...Qa1
- 2.Sxe2#
- 2.Rf6#
- 1...Qc3
- 2.Sxe2#
- 2.Rf6#
- 1...Qd3
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rxg6#
- 1...Qa6
- 2.Rxa6#
- 2.Rb6#
- 2.Rc6#
- 2.Rf6#
- 2.Qf8#
- 1...Qa8
- 2.Sxe2#
- 2.Rf6#
- 1...Re1
- 2.Se6#
- 2.Qf8#
- 1...Rd2
- 2.Se6#
- 2.Qf8#
- 1...Se4
- 2.Sxe2#
- 1...gxf3!
- threat
- 1.Sd4?
- threat
- 2.Sxe2#
- 2.Sde6#
- 2.Sge6#
- 2.Qf8#
- 1...Qxd6+
- 2.Qxd6#
- 1...Rxc2
- 2.Sde6#
- 2.Sge6#
- 2.Qf8#
- 1...Qd3
- 2.Sde6#
- 2.Sge6#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rxg6#
- 1...Qa6
- 2.Sde6#
- 2.Sge6#
- 2.Rxa6#
- 2.Rb6#
- 2.Rc6#
- 2.Rf6#
- 2.Qf8#
- 1...Qa8
- 2.Sxe2#
- 2.Sde6#
- 2.Sge6#
- 2.Rf6#
- 1...Re1
- 2.Sde6#
- 2.Sge6#
- 2.Qf8#
- 1...Rd2
- 2.Sde6#
- 2.Sge6#
- 2.Qf8#
- 1...Se4
- 2.Sxe2#
- 2.Sde6#
- 2.Sge6#
- 1...gxf3!
- threat
- 1.Sh6?
- threat
- 2.Qf8#
- 1...Qxd6+
- 2.Qxd6#
- 1...Qb2
- 2.Rf6#
- 1...Qa1
- 2.Rf6#
- 1...Qc3
- 2.Rf6#
- 1...Qd3
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rxg6#
- 1...Qa8
- 2.Rf6#
- 1...Se4!
- threat
- 1.Sg7?
- threat
- 2.S7e6#
- 2.Qf8#
- 1...Qxd6+
- 2.Qxd6#
- 1...Qb2
- 2.S7e6#
- 2.Rf6#
- 1...Qa1
- 2.S7e6#
- 2.Rf6#
- 1...Qc3
- 2.S7e6#
- 2.Rf6#
- 1...Qd3
- 2.S7e6#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rxg6#
- 1...Qa8
- 2.S7e6#
- 2.Rf6#
- 1...Se4
- 2.S7e6#
- 1...gxf3!
- threat
- 1.Bxe2?
- threat
- 2.Se6#
- 1...Qxd6+
- 2.Qxd6#
- 1...gxf3!
- threat
- 1.Rc5?
- threat
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rdd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rdc6#
- 2.Re6#
- 2.Rf6#
- 2.Rxg6#
- 1...gxf3
- 2.Rd4#
- 1...gxf5
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rdd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rdc6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 1...Qb2
- 2.Rd4#
- 1...Qb4
- 2.Rd4#
- 2.Rb6#
- 1...Qa1
- 2.Rd4#
- 1...Qb3
- 2.Rd4#
- 2.Rb6#
- 1...Qc3
- 2.Rd4#
- 1...Qd3
- 2.Rxd3#
- 2.Rd4#
- 2.Rdd5#
- 1...Qa5
- 2.Rd4#
- 2.Rb6#
- 1...Qa6
- 2.Rd4#
- 2.Rxa6#
- 2.Rb6#
- 2.Rdc6#
- 1...Qa7
- 2.Rd4#
- 1...Qa8
- 2.Rd4#
- 1...Rd2
- 2.Se6#
- 2.Rxd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rdd5#
- 1...Sd3
- 2.Rxd3#
- 2.Rd4#
- 1...Se4
- 2.Rd4#
- 1...Qxc5!
- threat
- 1.Qb4+?
- 1...Se4
- 2.Qxe4#
- 1...Qxb4!
- 1...Se4
- 1.Sg3?
- Keys
- 1.Sxe3!
- threat
- 2.Qf8#
- 1...Qxd6+
- 2.Qxd6#
- 1...Qxe3+
- 2.Re6#
- 1...Rxe3+
- 2.Se6#
- 1...Qxc1
- 2.Re6#
- 1...Rd2
- 2.Sg2#
- 1...Qb2
- 2.Rf6#
- 1...Qa1
- 2.Rf6#
- 1...Qc3
- 2.Rf6#
- 1...Qd3
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rxg6#
- 1...Qa8
- 2.Rf6#
- 1...Se4
- 2.Sg2#
- threat
- 1.Sxe3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 8
- REMOVED MATES = 5
- Sets
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(J)::QAB(M),XQ(c)
- Q(c);N_PINR(J)::QAB(M)+R(J)
- R(a);::S(I)
- R(a);XP(C)::S(I)
- R(a);N_SPINP(d)::S(I)
- P(f);OGATE::P(D),XP(f)
- Tries
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(J)::QAB(M),XQ(c)
- S(b);::S(H),XR(a)
- Refutation
- P(f);XP(E)
- Try
- S(H);
- Threat
- DUALS(4)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(J)::QAB(M),XQ(c)
- Refutation
- P(f);XP(E)
- Try
- S(H);
- Threat
- QAR(M)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(J)::QAB(M),XQ(c)
- Q(c);N_PINR(J)::QAB(M)+R(J),DCHECK
- Refutation
- S(b);
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(J)::QAB(M),XQ(c)
- S(b);::S(H)
- Refutation
- P(f);XP(E)
- Try
- B(B);XR(a)
- Threat
- S(I)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(J)::QAB(M),XQ(c)
- Refutation
- P(f);XP(E)
- Try
- R(G);N_SPINR(J)
- Threat
- DUALS(10)
- Vars
- P(f);XP(E)::QAB(M)+R(J),DCHECK
- Q(c);::QAB(M)+R(J),DCHECK
- Q(c);P_PINP(K)::QAB(M)+R(J),DCHECK
- S(b);::QAB(M)+R(J)
- Refutation
- Q(c);P_PINR(J),XR(G)
- Try
- Q(M);CHECK,N_SPINR(J)
- Vars
- S(b);N_GUARD,P_SPINS(b)::QAR1(M),XS(b)
- Refutation
- Q(c);P_PINR(J),XQ(M)
- Try
- Actual
- S(H);P_SPINS(H),XP(d)
- Threat
- QAR(M)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(J)::QAB(M),XQ(c)
- Q(c);CHECK,N_PINR(J),P_SPINQ(c),XS(H)::QAB(M)+R(J)
- R(a);CHECK,P_SPINR(a),XS(H)::S(I)
- Q(c);N_PINR(J),XB(A)::QAB(M)+R(J)
- R(a);N_PINS(H)::S(H)
- Q(c);N_PINR(J)::QAB(M)+R(J),DCHECK
- S(b);N_PINS(H)::B(A)+S(H),DCHECK
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).