MESON Chess Problem Database
Problem Display
PID: 151477 (nQR5/P1p5/B1pNK3/1pk4p/1p5R/rp1p4/1n1P4/2N5 w - - 0 1)
van der Ven, AMA
Good Companions (November), 1914
#2
9 + 11
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Sxb3#
- 1...Ra2
- 2.Sxb3#
- 1...Ra4
- 2.Sxb3#
- 1...Ra5
- 2.Sxb3#
- 1...Rxa6
- 2.Sxb3#
- 1...Sd1
- 2.Sxd3#
- 1...Sa4
- 2.Sxd3#
- 1...Sc4
- 2.Sxd3#
- 1...Sb6
- 2.Sb7#
- 1...cxd6
- 2.Qxb5#
- 1...Ra1
- Tries
- 1.Sxb5?
- 1...Rxa6
- 2.Sxb3#
- 1...cxb5
- 2.Qxb5#
- 1...Ra1
- 2.Sxb3#
- 1...Ra2
- 2.Sxb3#
- 1...Ra4
- 2.Sxb3#
- 1...Ra5
- 2.Sxb3#
- 1...Sd1
- 2.Sxd3#
- 1...Sa4
- 2.Sxd3#
- 1...Sc4
- 2.Sxd3#
- 1...Sb6!
- 1...Rxa6
- 1.Sf5?
- 1...Rxa6
- 2.Sxb3#
- 1...Ra1
- 2.Sxb3#
- 1...Ra2
- 2.Sxb3#
- 1...Ra4
- 2.Sxb3#
- 1...Ra5
- 2.Sxb3#
- 1...Sd1
- 2.Sxd3#
- 1...Sa4
- 2.Sxd3#
- 1...Sc4
- 2.Sxd3#
- 1...Sb6!
- 1...Rxa6
- 1.Sf7?
- 1...Rxa6
- 2.Sxb3#
- 1...Ra1
- 2.Sxb3#
- 1...Ra2
- 2.Sxb3#
- 1...Ra4
- 2.Sxb3#
- 1...Ra5
- 2.Sxb3#
- 1...Sd1
- 2.Sxd3#
- 1...Sa4
- 2.Sxd3#
- 1...Sc4
- 2.Sxd3#
- 1...Sb6!
- 1...Rxa6
- 1.Se8?
- 1...Rxa6
- 2.Sxb3#
- 1...Ra1
- 2.Sxb3#
- 1...Ra2
- 2.Sxb3#
- 1...Ra4
- 2.Sxb3#
- 1...Ra5
- 2.Sxb3#
- 1...Sd1
- 2.Sxd3#
- 1...Sa4
- 2.Sxd3#
- 1...Sc4
- 2.Sxd3#
- 1...Sb6!
- 1...Rxa6
- 1.Bxb5?
- 1...Rxa7
- 2.Sxb3#
- 1...cxb5
- 2.Qxb5#
- 1...cxd6
- 2.Rxc6#
- 1...Ra1
- 2.Sxb3#
- 1...Ra2
- 2.Sxb3#
- 1...Ra4
- 2.Sxb3#
- 1...Ra5
- 2.Sxb3#
- 1...Ra6
- 2.Sxb3#
- 1...Sd1
- 2.Sxd3#
- 2.Rc4#
- 1...Sa4
- 2.Sxd3#
- 2.Rc4#
- 1...Sc4
- 2.Sxd3#
- 2.Rxc4#
- 1...Sb6!
- 1...Rxa7
- 1.Re4?
- 1...Rxa6
- 2.Sxb3#
- 1...cxd6
- 2.Qxb5#
- 1...Sb6
- 2.Sb7#
- 1...Ra1
- 2.Sxb3#
- 1...Ra2
- 2.Sxb3#
- 1...Ra4
- 2.Sxb3#
- 1...Ra5
- 2.Sxb3#
- 1...Sd1
- 2.Sxd3#
- 1...Sa4
- 2.Sxd3#
- 1...Sc4
- 2.Sxd3#
- 1...h4!
- 1...Rxa6
- 1.Rf4?
- 1...Rxa6
- 2.Sxb3#
- 1...cxd6
- 2.Qxb5#
- 1...Sb6
- 2.Sb7#
- 1...Ra1
- 2.Sxb3#
- 1...Ra2
- 2.Sxb3#
- 1...Ra4
- 2.Sxb3#
- 1...Ra5
- 2.Sxb3#
- 1...Sd1
- 2.Sxd3#
- 1...Sa4
- 2.Sxd3#
- 1...Sc4
- 2.Sxd3#
- 1...h4!
- 1...Rxa6
- 1.Rxc7?
- threat
- 2.Qxb5#
- 1...Sb6
- 2.Sb7#
- 1...Ra5
- 2.Sxb3#
- 1...Sxc7+!
- threat
- 1.Rd8?
- 1...Rxa6
- 2.Sxb3#
- 1...Sb6
- 2.Sb7#
- 1...Ra1
- 2.Sxb3#
- 1...Ra2
- 2.Sxb3#
- 1...Ra4
- 2.Sxb3#
- 1...Ra5
- 2.Sxb3#
- 1...Sd1
- 2.Sxd3#
- 1...Sa4
- 2.Sxd3#
- 1...Sc4
- 2.Sxd3#
- 2.Se4#
- 1...cxd6!
- 1...Rxa6
- 1.Re8?
- 1...Rxa6
- 2.Sxb3#
- 1...Sb6
- 2.Sb7#
- 1...Ra1
- 2.Sxb3#
- 1...Ra2
- 2.Sxb3#
- 1...Ra4
- 2.Sxb3#
- 1...Ra5
- 2.Sxb3#
- 1...Sd1
- 2.Sxd3#
- 1...Sa4
- 2.Sxd3#
- 1...Sc4
- 2.Sxd3#
- 1...cxd6!
- 1...Rxa6
- 1.Rf8?
- threat
- 2.Rf5#
- 1...Sb6
- 2.Sb7#
- 1...Sc4
- 2.Sxd3#
- 1...cxd6!
- threat
- 1.Rg8?
- threat
- 2.Rg5#
- 1...Sb6
- 2.Sb7#
- 1...Sc4
- 2.Sxd3#
- 1...cxd6!
- threat
- 1.Rh8?
- threat
- 2.R8xh5#
- 1...Sb6
- 2.Sb7#
- 1...Sc4
- 2.Sxd3#
- 1...cxd6!
- threat
- 1.Qxc7?
- threat
- 2.Sb7#
- 2.Qxc6#
- 1...Rxa6
- 2.Sxb3#
- 2.Sb7#
- 1...Sxc7+!
- threat
- 1.Qb6+?
- 1...Sxb6
- 2.Sb7#
- 1...cxb6
- 2.Sb7#
- 1...Kxb6!
- 1...Sxb6
- 1.Qb7?
- 1...Rxa6
- 2.Sxb3#
- 1...cxd6
- 2.Rxc6#
- 2.Qxc6#
- 2.Qxb5#
- 1...Ra1
- 2.Sxb3#
- 1...Ra2
- 2.Sxb3#
- 1...Ra4
- 2.Sxb3#
- 1...Ra5
- 2.Sxb3#
- 1...Sd1
- 2.Sxd3#
- 1...Sa4
- 2.Sxd3#
- 1...Sc4
- 2.Sxd3#
- 1...Sb6!
- 1...Rxa6
- 1.Sxb5?
- Keys
- 1.Se2!
- threat
- 2.Rxh5#
- 1...dxe2
- 2.d4#
- 1...cxd6
- 2.Qxb5#
- 1...Sc4
- 2.Se4#
- 1...Sb6
- 2.Sb7#
- threat
- 1.Se2!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 7
- Sets
- R(b);N_GUARD::S(A),XP(c)
- R(b);N_GUARD,XB(D)::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(d)
- S(k);SBLOCK::S(E)
- P(j);P_SPINP(i),XS(E)::QAR1(H),XP(f)
- Tries
- Try
- S(E);XP(f)
- Vars
- R(b);N_GUARD,XB(D)::S(A),XP(c)
- P(i);OGATE,P_SPINP(j),XS(E)::QAR1(H),XP(i)
- R(b);N_GUARD::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(d)
- Refutation
- S(k);
- Try
- S(E);
- Vars
- R(b);N_GUARD,XB(D)::S(A),XP(c)
- R(b);N_GUARD::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(d)
- Refutation
- S(k);
- Try
- S(E);
- Vars
- R(b);N_GUARD,XB(D)::S(A),XP(c)
- R(b);N_GUARD::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(d)
- Refutation
- S(k);
- Try
- S(E);
- Vars
- R(b);N_GUARD,XB(D)::S(A),XP(c)
- R(b);N_GUARD::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(d)
- Refutation
- S(k);
- Try
- B(D);XP(f)
- Vars
- R(b);N_GUARD,XP(G)::S(A),XP(c)
- P(i);OGATE,P_SPINP(j),XB(D)::QAR1(H),XP(i)
- P(j);OGATE,P_SPINP(i),XS(E)::R1(I),XP(i)
- R(b);N_GUARD::S(A),XP(c)
- Refutation
- S(k);
- Try
- R(C);
- Vars
- R(b);N_GUARD,XB(D)::S(A),XP(c)
- P(j);P_SPINP(i),XS(E)::QAR1(H),XP(f)
- S(k);SBLOCK::S(E)
- R(b);N_GUARD::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(d)
- Refutation
- P(h);
- Try
- R(C);
- Vars
- R(b);N_GUARD,XB(D)::S(A),XP(c)
- P(j);P_SPINP(i),XS(E)::QAR1(H),XP(f)
- S(k);SBLOCK::S(E)
- R(b);N_GUARD::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(d)
- Refutation
- P(h);
- Try
- R(I);P_PINP(i),XP(j)
- Threat
- QAR1(H),XP(f)
- Vars
- S(k);SBLOCK::S(E)
- R(b);N_GUARD::S(A),XP(c)
- Refutation
- S(k);CHECK,N_SPINP(i),XR(I)
- Try
- R(I);
- Vars
- R(b);N_GUARD,XB(D)::S(A),XP(c)
- S(k);SBLOCK::S(E)
- R(b);N_GUARD::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(d)
- Refutation
- P(j);XS(E)
- Try
- R(I);
- Vars
- R(b);N_GUARD,XB(D)::S(A),XP(c)
- S(k);SBLOCK::S(E)
- R(b);N_GUARD::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(d)
- Refutation
- P(j);XS(E)
- Try
- R(I);
- Threat
- R(I)
- Vars
- S(k);SBLOCK::S(E)
- S(a);N_GUARD::S(A),XP(d)
- Refutation
- P(j);XS(E)
- Try
- R(I);
- Threat
- R(I)
- Vars
- S(k);SBLOCK::S(E)
- S(a);N_GUARD::S(A),XP(d)
- Refutation
- P(j);XS(E)
- Try
- R(I);
- Threat
- R(I),XP(h)
- Vars
- S(k);SBLOCK::S(E)
- S(a);N_GUARD::S(A),XP(d)
- Refutation
- P(j);XS(E)
- Try
- Q(H);P_PINP(i),XP(j)
- Threat
- DUALS(2)
- Refutation
- S(k);CHECK,N_SPINP(i),XQ(H)
- Try
- Q(H);CHECK
- Vars
- S(k);SBLOCK,XQ(H)::S(E)
- P(j);P_SPINP(i),SBLOCK,XQ(H)::S(E)
- Refutation
- K(g);S_FLIGHT,XQ(H)
- Try
- Q(H);
- Vars
- R(b);N_GUARD,XB(D)::S(A),XP(c)
- R(b);N_GUARD::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(d)
- Refutation
- S(k);
- Try
- Actual
- S(A);
- Threat
- R(C),XP(h)
- Vars
- P(d);OGATE,XS(A)::P(B)
- P(j);P_SPINP(i),XS(E)::QAR1(H),XP(f)
- S(a);SBLOCK::S(E)
- S(k);SBLOCK::S(E)
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