MESON Chess Problem Database

Problem Display
PID: 18794 (6K1/8/8/8/1R6/1N6/2kp4/QbN2B2 w - - 0 1)

Stocchi, Ottavio

2nd Prize, L'Italia Scacchistica, 1958

6K1/8/8/8/1R6/1N6/2kp4/QbN2B2

#2

6 + 3

3976 FIDE Album (1956-1958) 1961
145 StrateGems 2008

SOLUTION

  • SOUND
  • Sets
    • 1...d1Q
      • 2.Rc4#
    • 1...d1S
      • 2.Bd3#
    • 1...d1B
      • 2.Bd3#
      • 2.Rc4#
    • 1...d1R
      • 2.Rc4#
  • Tries
    • 1.Sd3?
      • 1...Kd1
        • 2.Qxb1#
      • 1...d1Q
        • 2.Qb2#
      • 1...d1S
        • 2.Se1#
      • 1...d1B
        • 2.Se1#
        • 2.Qb2#
      • 1...d1R
        • 2.Qb2#
      • 1...Ba2!
    • 1.Sd4+?
      • 1...Kxc1
        • 2.Rxb1#
        • 2.Qxb1#
      • 1...Kd1!
    • 1.Qb2+?
      • 1...Kd1
        • 2.Qxd2#
      • 1...Kxb2!
    • 1.Qc3+?
      • 1...Kd1
        • 2.Qxd2#
      • 1...Kxc3!
    • 1.Qd4?
      • threat
        • 2.Qxd2#
      • 1...Kd1
        • 2.Qxd2#
      • 1...dxc1Q
        • 2.Sa1#
      • 1...dxc1S
        • 2.Sa1#
        • 2.Qd2#
      • 1...dxc1B
        • 2.Sa1#
      • 1...dxc1R
        • 2.Sa1#
        • 2.Qd2#
      • 1...d1Q
        • 2.Rc4#
      • 1...d1S
        • 2.Bd3#
        • 2.Qd2#
      • 1...d1B
        • 2.Bd3#
        • 2.Rc4#
        • 2.Qd2#
      • 1...d1R
        • 2.Rc4#
      • 1...Ba2!
    • 1.Qxb1+?
      • 1...Kd1
        • 2.Sa2#
        • 2.Se2#
        • 2.Sd3#
      • 1...Kc3
        • 2.Sa2#
        • 2.Rc4#
      • 1...Kxb1!
    • 1.Qa2+?
      • 1...Kd1
        • 2.Qxd2#
      • 1...Kc3
        • 2.Rc4#
        • 2.Qxd2#
      • 1...Bxa2!
  • Keys
    • 1.Se2!
      • 1...Kd1
        • 2.Qxb1#
      • 1...Kd3
        • 2.Qc3#
      • 1...d1Q
        • 2.Qc3#
      • 1...d1S
        • 2.Sed4#
      • 1...d1B
        • 2.Sed4#
        • 2.Qc3#
      • 1...d1R
        • 2.Qc3#
      • 1...Ba2
        • 2.Sd4#

There are these versions: 18795

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::R(E)
    • P(c);SBLOCK::B(C)
  • Tries
    • Try
      • S(B);
      • Vars
        • K(b);P_SPINB(a),S_FLIGHT::QAR2(A),XB(a)
        • P(c);SBLOCK::QAR1(A)
        • P(c);N_GUARD,SBLOCK::S(B)
      • Refutation
        • B(a);P_PINS(D)
    • Try
      • S(D);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(A),XP(c)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(A),XP(c)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(c)
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::QAR1(A),XP(c)
        • P(c);SBLOCK,XS(B)::S(D)
        • P(c);::R(E)
      • Refutation
        • B(a);P_PINS(D)
    • Try
      • Q(A);CHECK,XB(a)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(A),XP(c)
      • Refutation
        • B(a);P_PINS(D),XQ(A)
  • Actual
    • S(B);
    • Vars
      • K(b);P_SPINB(a),S_FLIGHT::QAR2(A),XB(a)
      • K(b);S_FLIGHT::QAR1(A)
      • P(c);SBLOCK::QAR1(A)
      • P(c);SBLOCK::S(B)
      • B(a);P_PINS(D)::S(B)
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