MESON Chess Problem Database

Problem Display
PID: 97013 (2N5/2p5/B7/2kp4/1Np5/2Q1p3/4K3/8 w - - 0 1)

Mansurov, Nasir

Problem (Zagreb), 1956

2N5/2p5/B7/2kp4/1Np5/2Q1p3/4K3/8

#2

5 + 5

6490 yacpdb 2009
5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Qxc4#
    • 1...c6
      • 2.Sd3#
  • Tries
    • 1.Kd1?
      • 1...d4
        • 2.Qxc4#
      • 1...c6
        • 2.Sd3#
      • 1...e2+!
    • 1.Ke1?
      • 1...d4
        • 2.Qxc4#
      • 1...c6
        • 2.Sd3#
      • 1...e2!
    • 1.Kf1?
      • 1...d4
        • 2.Qxc4#
      • 1...c6
        • 2.Sd3#
      • 1...e2+!
    • 1.Kxe3?
      • 1...c6
        • 2.Sd3#
      • 1...d4+!
    • 1.Kf3?
      • 1...d4
        • 2.Qxc4#
      • 1...c6
        • 2.Sd3#
      • 1...e2!
    • 1.Sc2?
      • 1...d4
        • 2.Qxc4#
      • 1...c6
        • 2.Qb4#
        • 2.Qd4#
        • 2.Qa5#
        • 2.Qa3#
      • 1...Kc6!
    • 1.Sc6?
      • 1...d4
        • 2.Qxc4#
      • 1...Kxc6!
    • 1.Qxe3+?
      • 1...d4
        • 2.Qe7#
      • 1...Kxb4!
  • Keys
    • 1.Qa3!
      • 1...Kd4
        • 2.Qxe3#
      • 1...c6
        • 2.Sc2#
      • 1...c3
        • 2.Qxc3#
      • 1...d4
        • 2.Qa5#

This anticipates 97192(1963-1964)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);N_GUARD::QAR1(B),XP(b)
    • P(e);SBLOCK::S(C)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • P(d);N_GUARD::QAR1(B),XP(b)
        • P(e);SBLOCK::S(C)
      • Refutation
        • P(a);CHECK
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(d);N_GUARD::QAR1(B),XP(b)
        • P(e);SBLOCK::S(C)
      • Refutation
        • P(a);
    • Try
      • K(A);S_FLIGHT
      • Vars
        • P(d);N_GUARD::QAR1(B),XP(b)
        • P(e);SBLOCK::S(C)
      • Refutation
        • P(a);CHECK
    • Try
      • K(A);P-FLIGHT,XP(a)
      • Vars
        • P(e);SBLOCK::S(C)
      • Refutation
        • P(d);CHECK
    • Try
      • K(A);S_FLIGHT
      • Vars
        • P(d);N_GUARD::QAR1(B),XP(b)
        • P(e);SBLOCK::S(C)
      • Refutation
        • P(a);
    • Try
      • S(C);
      • Vars
        • P(d);N_GUARD::QAR1(B),XP(b)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(C);
      • Vars
        • P(d);N_GUARD::QAR1(B),XP(b)
      • Refutation
        • K(c);P-FLIGHT,XS(C)
    • Try
      • Q(B);CHECK,N_PINP(b),XP(a)
      • Vars
        • P(d);P_SPINP(d),SBLOCK::QAB(B)
      • Refutation
        • K(c);S_FLIGHT,XS(C)
  • Actual
    • Q(B);N_PINP(b)
    • Vars
      • K(c);S_FLIGHT::QAB1(B),XP(a)
      • P(e);SBLOCK::QAB(B)+S(C)
      • P(b);OGATEB::QAR2(B),XP(b)
      • P(d);SBLOCK::QAR2(B)
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