MESON Chess Problem Database

Problem Display
PID: 120956 (7n/2p2p2/2B2Kp1/6P1/RPk2p2/3Rp3/1Pn1P3/1qQN4 w - - 0 1)

Stocchi, Ottavio

Le Miroir du Monde, 1937

7n/2p2p2/2B2Kp1/6P1/RPk2p2/3Rp3/1Pn1P3/1qQN4

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Qxc2#
    • 1...Qa1
      • 2.Qxc2#
    • 1...Qxc1
      • 2.b3#
    • 1...Qxb2+
      • 2.Sxb2#
    • 1...f3
      • 2.Sxe3#
  • Tries
    • 1.Ke5?
      • threat
        • 2.Rc3#
      • 1...Qxb2+
        • 2.Sxb2#
      • 1...f6+!
    • 1.Bd7?
      • 1...Qxb2+
        • 2.Sxb2#
      • 1...Qxc1
        • 2.b3#
      • 1...Qa2
        • 2.Qxc2#
      • 1...Qa1
        • 2.Qxc2#
      • 1...f3
        • 2.Sxe3#
      • 1...c5
        • 2.b5#
      • 1...c6!
    • 1.Be8?
      • 1...Qxb2+
        • 2.Sxb2#
      • 1...Qxc1
        • 2.b3#
      • 1...Qa2
        • 2.Qxc2#
      • 1...Qa1
        • 2.Qxc2#
      • 1...f3
        • 2.Sxe3#
      • 1...c5
        • 2.b5#
      • 1...c6!
    • 1.Qd2?
      • threat
        • 2.Rc3#
        • 2.Qc3#
      • 1...Qxb2+
        • 2.Sxb2#
      • 1...exd2!
    • 1.Qxb1?
      • threat
        • 2.Qa2#
        • 2.Qxc2#
        • 2.b3#
      • 1...Sxb4
        • 2.Qc2#
        • 2.Qc1#
      • 1...Se1
        • 2.Qa2#
        • 2.b3#
      • 1...Sa3
        • 2.Qa2#
        • 2.b3#
      • 1...Sd4
        • 2.Rc3#
      • 1...Sa1!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Bd5#
      • 1...Kb3
        • 2.Bd5#
      • 1...Sxb4
        • 2.Sxb1#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::QAR2(A),XS(b)
    • Q(a);N_GUARD,P_PINP(C)::QAR2(A),XS(b)
    • Q(a);N_GUARD,N_SPINS(b),XQ(A)::P(C)
    • Q(a);CHECK,XP(C)::S(B),XQ(a)
    • P(e);N_GUARD::S(B),XP(c)
  • Tries
    • Try
      • K(J);S_FLIGHT
      • Threat
        • R1(E)
      • Vars
        • Q(a);CHECK,XP(C)::S(B),XQ(a)
      • Refutation
        • P(h);CHECK
    • Try
      • B(I);
      • Vars
        • Q(a);CHECK,XP(C)::S(B),XQ(a)
        • Q(a);N_GUARD,N_SPINS(b),XQ(A)::P(C)
        • Q(a);N_GUARD::QAR2(A),XS(b)
        • Q(a);N_GUARD,P_PINP(C)::QAR2(A),XS(b)
        • P(e);N_GUARD::S(B),XP(c)
        • P(g);SBLOCK::R(F)+P(G)
      • Refutation
        • P(g);
    • Try
      • B(I);
      • Vars
        • Q(a);CHECK,XP(C)::S(B),XQ(a)
        • Q(a);N_GUARD,N_SPINS(b),XQ(A)::P(C)
        • Q(a);N_GUARD::QAR2(A),XS(b)
        • Q(a);N_GUARD,P_PINP(C)::QAR2(A),XS(b)
        • P(e);N_GUARD::S(B),XP(c)
        • P(g);SBLOCK::R(F)+P(G)
      • Refutation
        • P(g);
    • Try
      • Q(A);N_PINS(b)
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);CHECK,XP(C)::S(B),XQ(a)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);N_PINS(b),XQ(a)
      • Threat
        • DUALS(3)
      • Vars
        • S(b);SBLOCK::R1(E)
      • Refutation
        • S(b);
  • Actual
    • S(B);N_PINS(b)
    • Threat
      • B(I)
    • Vars
      • K(d);S_FLIGHT::B(I)
      • S(b);P_SPINS(b),XP(G)::QAR(A)+S(B),XQ(a)
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